refactor(cache): use rm.content to remove expired content

[RahulGautamSingh]

Changes

• Use the combination of rm.content and rm.entry to remove the content from the disk and the entry from the index
• Remove cacache.verify as it took longer than desriable to confirm that content is removed

we give up the guarantee that we clear any and all unwanted entries from the index/disk
but we do delete the expired content from the disk with certainity, which was the original intention I believe

Context

Closes: #29795

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[rarkins]

I tested this locally and got:

DEBUG: Checking file package cache for expired items
DEBUG: Deleted 113 of 192 file cached entries in 302ms

I don't have a "before" to compare it to

[renovate-release]

🎉 This PR is included in version 37.418.3 🎉

The release is available on:

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• npm package (@latest dist-tag)
• 37.418.3

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