Update angular-cli monorepo to v21.0.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@angular/build	21.0.2 -> 21.0.3
@angular/cli	21.0.2 -> 21.0.3

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Release Notes

angular/angular-cli (@​angular/build)

v21.0.3: 21.0.3

Compare Source

@​angular-devkit/build-angular

Commit	Description
	conditionally provide Zone.js change detection in the built-in test main file

@​angular/build

Commit	Description
	Add custom middleware for to present an Angular-tailored message
	Ensure disposal of close-javascript-transformer
	ensure locale base href retains leading slash (#​32040)
	inject testing polyfills in Karma unit-test executor
	support NODE_EXTRA_CA_CERTS in SSR SSL plugin

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