[feat] support editing definitions and simplify metric selection

[Duansg]

What's changed?

close #4155

Support editing custom dashboard (Bulletin) definitions and simplify metric selection.

• Fix name validation so a bulletin keeps its own name when edited.
• Backfill name / type / monitors / metrics in the edit dialog.
• Replace the metric nz-transfer with a single checkable nz-tree.
• Disable the monitor-type select in edit mode.
• Merge label filtering into the monitor-name search (match name / label key / value) and remove the separate label-filter field.
• Show monitor labels as key:value tags in the dropdown.

Checklist

• I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

Add or update API

• I have added the necessary e2e tests and all cases have passed.

New

Edit - Query Monitors

Edit - Select Monitor Metrics

Dashboard