[FEATURE] Make runner name configurable to support persistent runners

[jkupferer]

Is your feature request related to a problem? Please describe.

We use persistent runners and the setup process causes the runner name to match the pod that was initially configured but then diverges after pod restart. This makes it difficult to identify which pod is handling execution.

Describe the solution you'd like

Allow the runner name to be configurable with an environment variable.

Describe alternatives you've considered

No idea.

Additional context

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