Bump solana_rbpf to version v0.2.18 (backport #21774)

[mergify]

This is an automatic backport of pull request #21774 done by Mergify.
Cherry-pick of a5a0dab has failed:

On branch mergify/bp/v1.9/pr-21774
Your branch is up to date with 'origin/v1.9'.

You are currently cherry-picking commit a5a0dabe7.
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Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   Cargo.lock
	both modified:   cli/Cargo.toml
	both modified:   programs/bpf/Cargo.lock
	both modified:   programs/bpf/Cargo.toml
	both modified:   programs/bpf_loader/Cargo.toml
	both modified:   rbpf-cli/Cargo.toml

no changes added to commit (use "git add" and/or "git commit -a")

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[mergify]

automerge label removed due to a CI failure

[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #21786 (e8f6264) into v1.9 (68fc72a) will increase coverage by 0.0%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             v1.9   #21786   +/-   ##
=======================================
  Coverage    81.4%    81.4%           
=======================================
  Files         511      511           
  Lines      143176   143176           
=======================================
+ Hits       116619   116625    +6     
+ Misses      26557    26551    -6     

[github-actions]

This PR has been automatically locked since there has not been any activity in past 14 days after it was merged.