add validator option --accounts-db-skip-shrink (backport #19028)

[mergify]

This is an automatic backport of pull request #19028 done by Mergify.
Cherry-pick of 3280ae3 has failed:

On branch mergify/bp/v1.7/pr-19028
Your branch is up to date with 'origin/v1.7'.

You are currently cherry-picking commit 3280ae3e9.
  (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:   core/src/validator.rs
	modified:   local-cluster/src/validator_configs.rs
	modified:   runtime/src/bank.rs
	modified:   validator/src/main.rs

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   core/tests/snapshots.rs
	both modified:   ledger/src/bank_forks_utils.rs
	both modified:   ledger/src/blockstore_processor.rs
	deleted by us:   replica-node/src/replica_node.rs
	both modified:   runtime/src/snapshot_utils.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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[mvines]

@Mergifyio rebase

[mergify]

Command rebase: success

Branch has been successfully rebased

[mergify]

automerge label removed due to a CI failure

[mvines]

halp merge conflicts

[solana-grimes]

😱 New commits were pushed while the automerge label was present.

[codecov]

Codecov Report

Merging #19128 (f7eee09) into v1.7 (8934a39) will increase coverage by 0.0%.
The diff coverage is 79.3%.

@@           Coverage Diff            @@
##             v1.7   #19128    +/-   ##
========================================
  Coverage    82.3%    82.3%            
========================================
  Files         436      436            
  Lines      123156   123336   +180     
========================================
+ Hits       101360   101576   +216     
+ Misses      21796    21760    -36     

[jeffwashington]

@CriesofCarrots I inspected the manual merge and the resulting full change. I also started a validator with this branch with and without the --accounts-db-skip-shrink option. All seems correct.