fix(vitest-angular): set correct type in package.json based on output format

[brandonroberts]

PR Checklist

Closes #1436 Closes #1437

What is the new behavior?

• Sets the type is set to commonjs for the vitest-angular package to be fully compatible with Angular builders and native Vitest.
• Fixes console warning about sourcemaps

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Other information

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