feat(@schematics/angular): add browserMode option to jasmine-vitest schematic

[jnizet]

This option allows not migrating the toHaveClass assertion, which exists in Vitest in browser mode and thus is best left as is.

fix #31917

PR Checklist

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• 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: #31917

What is the new behavior?

A new browserMode option allows not migrating the toHaveClass assertion, which exists in Vitest in browser mode and thus is best left as is.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[clydin]

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

• main: 36cf3af