fix(build): no test case will throw error

[archerzz]

Description

vitest will throw error by default if no test is found. To suppress this error, we need to add --passWithNoTests to the options.

An alternative is to set up a vitest.config file and define that option. That's probably overdone since emitter codes are no longer maintained here.

Checklist

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• The PR has a understandable title and description explaining the why and what.
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Ready to Land?

• Build is completely green
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[archerzz]

See the regen test run: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=4100324&view=results