Make account shrink configurable #17544 (backport #17778)

[mergify]

This is an automatic backport of pull request #17778 done by Mergify.
Cherry-pick of 269d995 has failed:

On branch mergify/bp/v1.7/pr-17778
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Changes to be committed:
	modified:   accounts-bench/src/main.rs
	modified:   core/src/tvu.rs
	modified:   core/src/validator.rs
	modified:   ledger/src/blockstore_processor.rs
	modified:   local-cluster/src/validator_configs.rs
	modified:   runtime/benches/accounts.rs
	modified:   runtime/src/accounts.rs
	modified:   runtime/src/bank.rs
	modified:   runtime/src/serde_snapshot.rs
	modified:   runtime/src/serde_snapshot/tests.rs
	modified:   validator/src/main.rs

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   core/tests/snapshots.rs
	both modified:   ledger/src/bank_forks_utils.rs
	both modified:   runtime/src/accounts_db.rs
	both modified:   runtime/src/snapshot_utils.rs

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[solana-grimes]

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

[jeffwashington]

@lijunwangs I had to manually merge this. Please verify that I did it correctly.

[lijunwangs]

looks good

[mergify]

automerge label removed due to a CI failure

[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #18013 (22bbe87) into v1.7 (b472dac) will increase coverage by 0.0%.
The diff coverage is 95.8%.

@@           Coverage Diff            @@
##             v1.7   #18013    +/-   ##
========================================
  Coverage    82.5%    82.5%            
========================================
  Files         432      432            
  Lines      120366   120565   +199     
========================================
+ Hits        99304    99500   +196     
- Misses      21062    21065     +3