[Angular] Add Vitest as alternative to Jest.

[mshima]

Overview of the feature request

Angular provides experimental support to Vitest https://angular.dev/guide/testing/unit-tests.

We currently use Jest which is experimental and depends on third party dependencies (https://github.com/just-jeb/angular-builders/tree/master/packages/jest).

Motivation for or Use Case

Both Vitest and Jest are experimental, but Vitest is supported without a third party dependency requirement.

Related issues or PR

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