Address the `gocritic` linter warnings

[ademidoff]

Description

We silenced a number of gocritic rule warnings in this PR to reduce the scope. However, addressing some of the warnings could simplify and optimize the code (see this conversation).

Suggested solution

No response

Additional context

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Code of Conduct

• I agree to follow this project's Code of Conduct

[Rajan-226]

Hey, Can I pick this?

[Rajan-226]

@ademidoff @BupycHuk Can I pick this?
I'm looking for start contributing to percona, so looking for good first issues. LMK if you've any other tasks as well which can help me onboard fast.