Require program account to be writable in extend program data ix (backport #27911)

[mergify]

This is an automatic backport of pull request #27911 done by Mergify.
Cherry-pick of 108b245 has failed:

On branch mergify/bp/v1.14/pr-27911
Your branch is up to date with 'origin/v1.14'.

You are currently cherry-picking commit 108b245e6.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	deleted:    programs/bpf-loader-tests/tests/extend_program_data_ix.rs
	new file:   programs/bpf-loader-tests/tests/extend_program_ix.rs
	modified:   sdk/program/src/bpf_loader_upgradeable.rs
	modified:   sdk/program/src/loader_upgradeable_instruction.rs
	modified:   sdk/src/feature_set.rs
	modified:   transaction-status/src/parse_bpf_loader.rs

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   programs/bpf_loader/src/lib.rs

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[mergify]

automerge label removed due to a CI failure