Add more reporting for invalid stake cache members and prune them (backport #21654)

[mergify]

This is an automatic backport of pull request #21654 done by Mergify.
Cherry-pick of 6fc3291 has failed:

On branch mergify/bp/v1.8/pr-21654
Your branch is up to date with 'origin/v1.8'.

You are currently cherry-picking commit 6fc329180.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   runtime/src/stakes.rs
	modified:   sdk/src/feature_set.rs

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   Cargo.lock
	both modified:   programs/bpf/Cargo.lock
	both modified:   runtime/Cargo.toml
	both modified:   runtime/src/bank.rs

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #21740 (361e05e) into v1.8 (7ac43b1) will decrease coverage by 0.0%.
The diff coverage is 61.3%.

@@            Coverage Diff            @@
##             v1.8   #21740     +/-   ##
=========================================
- Coverage    81.6%    81.6%   -0.1%     
=========================================
  Files         459      459             
  Lines      130443   130501     +58     
=========================================
+ Hits       106516   106543     +27     
- Misses      23927    23958     +31     

[github-actions]

This PR has been automatically locked since there has not been any activity in past 14 days after it was merged.