[CI] Cleaning self-hosted runners

[KFilipek]

[CI] Cleaning self-hosted runners

Rationale

There is a need to harden self-hosted runners. Typically there are a few ways to do that:

• Pre/post hook-scripts (https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/running-scripts-before-or-after-a-job)
• ARC with ephemeral runners enabled
• Volatile VMs with ephemeral runners (just-in-time registration of runners)
• Other inspirational approaches: https://jonico.github.io/awesome-runners/

From my point of view, the first option is the easiest to adopt, just one shell script with passing as an input when running a runner.
ACTIONS_RUNNER_HOOK_JOB_STARTED=cleaning_script.sh ACTIONS_RUNNER_HOOK_JOB_COMPLETED=cleaning_script.sh ./run.sh

Description

API Changes

None, transparent from the workflow point of view.

Implementation details

Depending on the chosen approach, other implementation requirements will be mostly related to the infrastructure setup.

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