js_printer: parenthesize missing-import void 0 on LHS of ** - #36134

…n its assertions (#41028)

### Problem
- `test/bundler/esbuild/importstar.test.ts` takes 11s on the debian 13
x64-asan lane (build 108747). The default `itBundled` backend is `api`,
which the harness registers with `it.serial` (`expectBundled.ts:1962`),
so its 75 cases run one at a time. 64 of them spawn a subprocess for
`run`.
- Three cases only check that the build succeeds.
`ImportStarMangleNoBundleNoCapture` is a copy of the Capture case.

### Fix
- Default the file to the CLI backend (the wrapper from
`bundler_compile.test.ts`) and use `describe.concurrent`. Error and
warning cases pass on it unchanged.
- New checks: `ImportStarAndCommonJS` runs the bundle, no `__commonJS`
wrapper. `ExportSelfIIFE` runs the bundle, no `__reExport` helper.
`ImportExportOtherAsNamespaceCommonJS` requires the bundle and checks
the JSON. `ImportStarNoCapture` and `ImportStarExportStarNoCapture`: no
namespace object (`__export`). `ImportStarMangleNoBundleNoCapture` gets
the upstream no-capture entry point.
- Verified: `bun bd test test/bundler/esbuild/importstar.test.ts`
(debug, ASAN): 35.3s and 35.4s before, 12.4s to 14.5s after (six runs).
Released bun: 0.7s before, 0.25s after. 75 pass, 4 todo, every run.
expect() calls: 64 before, 71 after.

### Background
- The `api` backend calls `Bun.build()` in the test process with
`process.chdir`, so the harness makes it serial. The `cli` backend
spawns `bun build` in the case's own directory and can overlap.
- `bun test` runs consecutive concurrent cases as one group of up to 20.
A serial case ends the group, so the no-`run` cases also use `cli` (on
`api` they measured 15.4s).
- `__export` builds a namespace object. `__commonJS` wraps a CommonJS
module. `__reExport` copies exports at runtime for `export *` of an
external module.

<details><summary>Notes</summary>

What was not changed, and why:
- `ImportStarExportStarAsNoCapture` and
`ImportStarExportImportStarNoCapture` get no `__export` check. Bun still
materializes the namespace for `ns.foo` through a re-export (esbuild
binds `foo` directly). #41009 changes that and adds cases at the end of
this file. This branch does not touch those lines.
- `ImportDefaultNamespaceComboNoDefault1` to `4` stay separate builds.
Bun reports only the first entry point's error, so one build with four
entry points would check one error instead of four.
- No case in the file sets `timeoutScale`.
- No cases are grouped into shared builds. Each case has its own module
graph with the same file names (`entry.js`, `foo.js`, `bar.js`).

Other checks:
- `bun bd test ... --todo`: the 4 todo cases still fail, as on main.
- `BUN_BUNDLER_TEST_USE_ESBUILD=1`: main fails 32 cases because the API
backend passes neither `format` nor `external` to `esbuild.build()`.
This branch fails 2: `ImportStarCommonJSCapture` (esbuild adds `default`
to the CommonJS namespace, noted in the case) and
`ReExportStarEntryPointAndInnerFileExternal` (#37829).
- Mutation check of the new output checks with the released bun:
capturing `ns` in `ImportStarNoCapture` makes `__export` appear and the
case fails. A CommonJS `foo.js` in `ImportStarAndCommonJS` makes
`__commonJS` appear and the case fails.
- Line 2 (the `itBundled` import) also changes in #36714 and #36134
(they add `expect` to line 1). The merge conflict is those two lines.
- Debug ASAN runs after the change: 12.4s, 12.4s, 12.5s, 14.1s, 12.6s,
14.5s (runner's own `Ran 79 tests` line, host load average about 30).
Released bun: 0.78s and 0.67s before, 0.25s and 0.24s after.

</details>

<!-- robobun:evidence:begin -->

---

**[stamp-90s]** gate passed · iteration 0 · 1 files touched

<details><summary>passes on PR (with fix)</summary>

```console
Test-only change.

Debug/ASAN (expected pass):
$ bun bd test 'test/bundler/esbuild/importstar.test.ts'
$ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test test/bundler/esbuild/importstar.test.ts
bun test v1.4.1 (a6c4cc2)

test/bundler/esbuild/importstar.test.ts:
(pass) bundler > importstar/ImportStarExportImportStarUnused [860.67ms]
(pass) bundler > importstar/ImportStarCapture [933.82ms]
(pass) bundler > importstar/ImportStarUnused [1362.73ms]
(pass) bundler > importstar/ImportStarExportImportStarNoCapture [981.69ms]
(pass) bundler > importstar/ImportStarNoCapture [1252.30ms]
(pass) bundler > importstar/ImportStarExportImportStarCapture [737.57ms]
(pass) bundler > importstar/ImportStarExportStarAsUnused [729.34ms]
(pass) bundler > importstar/ImportStarExportStarAsNoCapture [754.71ms]
(pass) bundler > importstar/ImportStarExportStarAsCapture [944.90ms]
(pass) bundler > importstar/ImportStarExportStarUnused [767.40ms]
(pass) bundler > importstar/ImportStarExportStarCapture [680.23ms]
(pass) bundler > importstar/ImportStarCommonJSUnused [664.77ms]
(pass) bundler > importstar/ImportStarExportStarNoCapture [791.44ms]
(pass) bundler > importstar/ImportStarCommonJSNoCapture [701.31ms]
(pass) bundler > importstar/ImportStarCommonJSCapture [782.90ms]
(pass) bundler > importstar/ImportStarNoBundleUnused [414.74ms]
(pass) bundler > importstar/ImportStarAndCommonJS [682.71ms]
(pass) bundler > importstar/ImportStarNoBundleCapture [696.13ms]
(pass) bundler > importstar/ImportStarNoBundleNoCapture [689.50ms]
(pass) bundler > importstar/ImportStarMangleNoBundleUnused [726.10ms]
(pass) bundler > importstar/ImportStarMangleNoBundleCapture [718.23ms]
(pass) bundler > importstar/ImportStarMangleNoBundleNoCapture [640.67ms]
(pass) bundler > importstar/ImportExportStarAmbiguousError [366.27ms]
(pass) bundler > importstar/ImportStarExportStarOmitAmbiguous [723.51ms]
(pass) bundler > importstar/ImportExportStarAmbiguous [604.14ms]
(pass) bundler > importstar/ReExportStarNameCollisionNotAmbiguousImport [606.40ms]
(pass) bundler > importstar/ReExportS
... (truncated)
Exit: 0
```

</details>

<details><summary>diff hotspot</summary>

```
test/bundler/esbuild/importstar.test.ts | 44 ++++++++++++++++++++++++++++++---
 1 file changed, 40 insertions(+), 4 deletions(-)
```

</details>

**gate history** · 1 passed · 0 rejected · iteration 0

<details><summary>evidence per changed file</summary>

```
file                                     reads  edits  tests
test/bundler/esbuild/importstar.test.ts      2      9      0
```

</details>

<!-- robobun:evidence:end -->