Feature - Rekey remove_accounts_executable_flag_checks

[Lichtso]

Problem

#5158 could not do so because the feature set did not reside in this repository at the time.
This will be backported to v2.2 inside #5207.

Summary of Changes

Rekeys remove_accounts_executable_flag_checks.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.3%. Comparing base (2040e8b) to head (910a72c).

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #5464     +/-   ##
=========================================
- Coverage    83.3%    83.3%   -0.1%     
=========================================
  Files         821      821             
  Lines      372153   372153             
=========================================
- Hits       310344   310342      -2     
- Misses      61809    61811      +2     

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[jstarry]

Can't land this until we switch over the feature set from solana-feature-set to agave-feature-set
https://discord.com/channels/428295358100013066/910937142182682656/1354182908335620116
cc @t-nelson