Do periodic inbound cleaning for rooted slots (bp #8436)

[mergify]

This is an automated backport of pull request #8436 done by Mergify.io

Cherry-pick of d861033 has failed:

On branch mergify/bp/v0.23/pr-8436
Your branch is up to date with 'origin/v0.23'.

You are currently cherry-picking commit d86103383.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)

	both modified:   ledger/src/snapshot_utils.rs
	both modified:   runtime/src/accounts_db.rs
	both modified:   runtime/src/accounts_index.rs
	both modified:   runtime/src/bank.rs

no changes added to commit (use "git add" and/or "git commit -a")

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[codecov]

Codecov Report

Merging #8582 into v0.23 will increase coverage by <.1%.
The diff coverage is 98.2%.

@@           Coverage Diff           @@
##           v0.23   #8582     +/-   ##
=======================================
+ Coverage   80.5%   80.5%   +<.1%     
=======================================
  Files        251     251             
  Lines      54733   54867    +134     
=======================================
+ Hits       44082   44213    +131     
- Misses     10651   10654      +3