Migrate ABP Angular templates to Vitest as the default testing framework #21518
BackDescription
Resolves https://github.com/abpframework/abp/issues/24714 (write the related issue number if available)
This PR updates the ABP Angular templates to use Vitest as the default testing framework instead of the existing setup
How to test it?
Run yarn install (or simply yarn) in volo\abp\templates\app-nolayers-pro\angular
Run yarn test in volo\abp\templates\app-nolayers-pro\angular
Repeat the same steps for the other Angular template folders as well
Note: Any existing or newly discovered test issues will be handled separately. This PR is intentionally scoped only to the Vitest migration.