Move last diff in ID triaged category to accepted

[weswigham]

The error corsa issues is just better, since it actually reports the issue inference failed with.

[Copilot]

Pull request overview

This PR reclassifies the isolatedDeclarationsAddUndefined isolated-declarations error output change from “triaged (to be fixed)” to “accepted (intentional divergence)”, reflecting that Corsa’s diagnostic is preferable and should not be tracked as a to-fix diff.

Changes:

• Removed compiler/isolatedDeclarationsAddUndefined.errors.txt.diff from submoduleTriaged.
• Added compiler/isolatedDeclarationsAddUndefined.errors.txt.diff to submoduleAccepted with a short rationale comment.
• Added the corresponding accepted baseline diff file under testdata/baselines/reference/submoduleAccepted/compiler/.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
testdata/submoduleTriaged.txt	Removes the isolated-declarations diff from the “triaged” list.
testdata/submoduleAccepted.txt	Adds the isolated-declarations diff to the “accepted” list with a rationale header.
testdata/baselines/reference/submoduleAccepted/compiler/isolatedDeclarationsAddUndefined.errors.txt.diff	Introduces the accepted baseline diff capturing the improved diagnostic (TS9011 → TS9025 + caret location change).

Comments suppressed due to low confidence (1)

testdata/submoduleAccepted.txt:1442

• The new accepted-diff header has a grammar issue ("error issued" reads awkwardly) and the trailing blank line appears to contain whitespace. Consider rewording the header for clarity and drop the trailing whitespace-only line.

# Better isolatedDeclarations error issued on cast initializer before required parameter
compiler/isolatedDeclarationsAddUndefined.errors.txt.diff