fix(secretsmanager): remove RequiresReplace for secretsmanager description

[j1n-o9r]

Description

Change in the secretsmanager description triggers unnecessary replacement of resource.

relates to STACKITTPR-649 and #882

Testing Instructions

Acceptance tests are currently blocked by STACKITSMA-1012, therefore you must test it manually:

resource "stackit_secretsmanager_instance" "example" {
  project_id = local.project_id
  name       = "example-name"
}

resource "stackit_secretsmanager_user" "example" {
  project_id    = local.project_id
  instance_id   = stackit_secretsmanager_instance.example.instance_id
  description   = ""
  write_enabled = false
}

run terraform apply and approve -> the instance and the user should be created. Then change the user resource:

resource "stackit_secretsmanager_user" "example" {
  project_id    = local.project_id
  instance_id   = stackit_secretsmanager_instance.example.instance_id
  description   = "example"
  write_enabled = false
}

run terraform apply -> tf should suggest an inplace update for the user.

Checklist

• Issue was linked above
• Code format was applied: make fmt
• Examples were added / adjusted (see examples/ directory)
• Docs are up-to-date: make generate-docs (will be checked by CI)
• Unit tests got implemented or updated
• Acceptance tests got implemented or updated (see e.g. here)
• Unit tests are passing: make test (will be checked by CI)
• No linter issues: make lint (will be checked by CI)

[github-actions]

Merging this branch will not change overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/secretsmanager/user	16.14% (ø)

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/secretsmanager/user/resource.go	13.10% (ø)	168	22	146

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/secretsmanager/user/resource_test.go