feat(http): Stop caching GET responses in memory

[zharinov]

Changes

Remove memory cache for GET requests during repository run.

Previously, all GET requests were cached in memory during repository runs.
Since then, Renovate has evolved to use package/repository cache more efficiently.
The memory cache is now redundant and unnecessarily consumes resources,
as these requests are unlikely to be repeated during a single run.

To justify that, I created the test repo with package.json stolen from Renovate.

This is the heap dump in main branch after dry-run:

This is the heap dump performed by the branch of this PR:

• Another example is Zed editor repo: 300Mb vs 200Mb (lots of Rust deps)
• My Rubygems test repo: 350Mb vs 300Mb

Context

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]

Memory is reduced but need to confirm that http requests don't increase accordingly

[zharinov]

Yeah, I'll create "cache provider" class for memory cache too, and then will use it for all cases that rely on this type of caching (e.g. platform code).

[rarkins]

Before this?

[zharinov]

Yep, so I need the bunch of PRs to be merged

[viceice]

so marking this as draft

[zharinov]

• Superseded by feat(http): Switch to memory cache provider #33901