Use a global bounded threadpool when using persistent workers

[sfc-gh-mgalindo]

Checklist

• I have filed an issue about this change and discussed potential changes with the maintainers.
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• This is not a stylistic, refactoring, or cleanup change.

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Discussion thread for this change

Issue number: intellij/issues/5362

Description of this change

Using one per worker request causes the OS to run out of threads

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[sgowroji]

Hi @sfc-gh-mgalindo, Could you please sign the CLA ?

[sfc-gh-mgalindo]

Hi @sfc-gh-mgalindo, Could you please sign the CLA ?

@sgowroji done

[tpasternak]

Thank you @sfc-gh-mgalindo