sanitize decorators and callable parameters on entrypoint load

[soamicharan]

During prefect deploy command execution, if python environment is not setup prefect load entrypoint using code parsing by ast module.
Now this is done by _sanitize_and_load_flow function which tries to sanitize code definition and try to load the flow.
Now in flow decorator, if it used any other decorator or uses callback hooks on_completion, on_running etc. then it will throw ScriptError.
So in this PR, try to sanitize the decorators and keywords used in flow decorator to try to load flow.

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • prefect deploy script loading with complex callback hooks raising ScriptErrors #15942
• If this pull request adds new functionality, it includes unit tests that cover the changes
• If this pull request removes docs files, it includes redirect settings in mint.json.
• If this pull request adds functions or classes, it includes helpful docstrings.

[codspeed-hq]

CodSpeed Performance Report

Merging #15932 will not alter performance

_{Comparing soamicharan:enchance-safe-entrypoint-load (8fc7d81) with main (575a1f6)}

Summary

✅ 3 untouched benchmarks

[desertaxle]

Thanks for the PR @soamicharan! Could you please open an GitHub issue with an MRE describing the bug you're fixing here? That will be very helpful for me to understand the issue and help me make sure that the solution fits in well with the surrounding code.

[soamicharan]

• cript loading with complex callback hooks raising ScriptErrors prefect deploy script loading with complex callback hooks raising ScriptErrors #15942

Thanks for suggestion
#15942
@desertaxle linked the Issue