fix(@angular-devkit/build-angular): support aot option for karma browser builder

[cexbrayat]

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?

aot: true is supported by the karma builder, but only with the application builder, as the option is ignored with the browser builder.

What is the new behavior?

The option is also used by the browser builder

Does this PR introduce a breaking change?

• Yes
• No

Other information

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