Organize security policy frontend test mocks

What does this MR do and why?

Describe in detail what your merge request does and why.

Organize security policy frontend test mocks

• separate them into different files by policy type
• update naming convention to be consistent
• remove wrapper.destroys that are no longer needed

Changelog: changed

EE: true

Screenshots or screen recordings

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N/A, only tests

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

N/A, only tests

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.

Related to #383147 (closed)