Fixes accounts data size tracking in Bank::store_account_and_update_capitalization()

[brooksprumo]

Problem

Bank::store_account_and_update_capitalization() does not update accounts_data_size correctly if the new account has zero lamports (i.e. is being closed).

Summary of Changes

Fix it.

[brooksprumo]

@jstarry - requesting your review because I feel like you're someone who knows about this code.
@igor56D - requesting your review as someone looking into the accounts data size stuff.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.5%. Comparing base (7fa607c) to head (739aac8).
⚠️ Report is 13 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9418   +/-   ##
=======================================
  Coverage    82.5%    82.5%           
=======================================
  Files         895      895           
  Lines      322472   322500   +28     
=======================================
+ Hits       266223   266270   +47     
+ Misses      56249    56230   -19     

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[jstarry]

Looks like it's not used currently but can we fix fn replace_program_account too?

[brooksprumo]

Looks like it's not used currently but can we fix fn replace_program_account too?

Already done! #9396