fix(@schematics/angular) VS Code background compilation start/end patterns

[karcherm]

The task is initially "active", and should be considered "completed" when the bundle generation result is displayed, even if the generation failed. The task should only switch back to "active" when changes are detected, not on any arbitrary output by ng watch.

Fixes #32111

PR Checklist

Please check to confirm your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular-cli/blob/main/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: #32111

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

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[hybrist]

@karcherm Thanks for sending this! I think the change itself looks good but the commit message is missing the : after the closing parenthesis. Can you amend and force push with an updated commit message?

[karcherm]

@karcherm Thanks for sending this! I think the change itself looks good but the commit message is missing the : after the closing parenthesis. Can you amend and force push with an updated commit message?

Done

[hybrist]

This PR was merged into the repository. The changes were merged into the following branches:

• main: 52ace04
• 21.0.x: b671245