feature: parallel pipelines start/stop execution

[rustatian]

Reason for This PR

closes: roadrunner-server/roadrunner#1672
TESTS done with AMQP driver.

Description of Changes

• Split validation and execution logic (validate that the driver exists, configuration check)
• Configurable worker pool
• errorgroups for the stop operation
• New option: parallelism to have over the parallel pipelines start/stop/destroy operations.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[Kaspiman]

Hello @rustatian! Do you have any plans for destroy parallelization? As i mentioned in original issue it slow too.

[rustatian]

Hey @Kaspiman 👋🏻
Yeah, sure. The PR in draft atm 😃