refactor: refactor resource reclamation

[elysium-w]

…rove readability and maintainability.

What type of PR is this?

What this PR does / why we need it:

refactor resource reclamation into modular functions to improve readability and maintainability.

Which issue(s) this PR fixes:

Fixes #3738

Special notes for your reviewer:

Does this PR introduce a user-facing change?

none

[volcano-sh-bot]

@elysium-w: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

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/ok-to-test

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[elysium-w]

@hwdef @Monokaix @JesseStutler PTAL

[hwdef]

a little big. I'll check this later.

[elysium-w]

@hwdef @Monokaix @JesseStutler If you have time, please take a look. Thank you very much.

[JesseStutler]

/cc

[lowang-bh]

/ok-to-test

[volcano-sh-bot]

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