feat(jest-cli): export buildArgv #12456

[dongwa]

Summary

People need a function to get the argv of runCLI,so we should export buildArgv to help that，ref #12456

And then, we can use this way to run jest programmatically with ts support

import { runCLI, buildArgv} from 'jest'

  const jestArgv = await buildArgv(process.argv)
  runCLI(
    jestArgv,
    [cwd]
  )

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: dongwa / name: donglin (018074b, f1a17c6)
• ✅ login: SimenB / name: Simen Bekkhus (a272b17, 75c4de6)

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[github-actions]

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[SimenB]

thanks!