remove expected rent collection and rehashing completely (backport #28422)

[mergify]

This is an automatic backport of pull request #28422 done by Mergify.
Cherry-pick of 28a89a1 has failed:

On branch mergify/bp/v1.14/pr-28422
Your branch is up to date with 'origin/v1.14'.

You are currently cherry-picking commit 28a89a1d9.
  (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/bank.rs
	modified:   runtime/src/lib.rs

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   accounts-bench/src/main.rs
	both modified:   core/src/accounts_hash_verifier.rs
	deleted by us:   core/tests/epoch_accounts_hash.rs
	both modified:   runtime/benches/accounts.rs
	both modified:   runtime/src/accounts_background_service.rs
	both modified:   runtime/src/accounts_db.rs
	deleted by them: runtime/src/expected_rent_collection.rs
	both modified:   runtime/src/snapshot_package.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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[jeffwashington]

this may be the source of a bank hash mismatch error. Preparing just in case.

[mergify]

automerge label removed due to a CI failure

[jeffwashington]

this was done as part of #28532