Bug: obsolete TODOs and parameter in `worker.rs`

[PiotrKorkus]

Original report: https://github.com/qorix-group/inc_orchestrator_internal/issues/230

Describe the bug:

There's an obsolete TODO list in impl Worker docstring.
There's an unused _prio parameter in Worker::new that won't be used -> priority is set using Worker::start thread_params parameter.

src/async_runtime/src/scheduler/workers/worker.rs

Steps to reproduce the behavior:

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Observed behavior:

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Expected behavior

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Occurrence:

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