introduce VITEST_WORKER_ID or similar env var

[capaj]

Clear and concise description of the problem

jest has JEST_WORKER_ID, which is useful for example when running X parallel tests, each test can connect to a different DB.

Suggested solution

it would be nice to be able to use VITEST_WORKER_ID env var to identify workers.
Ideally this would be a positive integer rather then a UUID

Alternative

the worker ID could also be available as an export that clients could import for example like:

import { workerId } from 'vitest'

Additional context

No response

Validations

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• Read the Contributing Guidelines.
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• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[capaj]

this will be released in 0.3.7 right?

[sheremet-va]

this will be released in 0.3.7 right?

Yes