Reject faked stake/vote accounts in stake mgmt. (bp #13615)

[mergify]

This is an automated backport of pull request #13615 done by Mergify

Cherry-pick of 2b3faa1 has failed:

On branch mergify/bp/v1.3/pr-13615
Your branch is up to date with 'origin/v1.3'.

You are currently cherry-picking commit 2b3faa194.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:

	modified:   programs/stake/src/stake_state.rs

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

	both modified:   programs/stake/src/stake_instruction.rs

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[codecov]

Codecov Report

Merging #13620 (d4baae2) into v1.3 (29ac8f5) will increase coverage by 0.0%.
The diff coverage is 100.0%.

@@          Coverage Diff           @@
##            v1.3   #13620   +/-   ##
======================================
  Coverage   82.4%    82.4%           
======================================
  Files        368      368           
  Lines      87684    87745   +61     
======================================
+ Hits       72287    72352   +65     
+ Misses     15397    15393    -4