Rename Packets to PacketBatch (backport #21794)

[mergify]

This is an automatic backport of pull request #21794 done by Mergify.
Cherry-pick of 254ef3e has failed:

On branch mergify/bp/v1.8/pr-21794
Your branch is up to date with 'origin/v1.8'.

You are currently cherry-picking commit 254ef3e7b.
  (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:
	modified:   banking-bench/src/main.rs
	modified:   bench-streamer/src/main.rs
	modified:   core/benches/banking_stage.rs
	modified:   core/benches/sigverify_stage.rs
	modified:   core/src/retransmit_stage.rs
	modified:   core/src/sigverify.rs
	modified:   core/src/sigverify_shreds.rs
	modified:   ledger/benches/sigverify_shreds.rs
	modified:   ledger/src/sigverify_shreds.rs
	modified:   perf/benches/recycler.rs
	modified:   perf/benches/sigverify.rs
	modified:   perf/src/packet.rs
	modified:   perf/src/recycler.rs
	modified:   perf/src/sigverify.rs
	modified:   streamer/src/packet.rs

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   core/src/ancestor_hashes_service.rs
	both modified:   core/src/banking_stage.rs
	both modified:   core/src/cluster_info_vote_listener.rs
	both modified:   core/src/fetch_stage.rs
	both modified:   core/src/serve_repair.rs
	both modified:   core/src/shred_fetch_stage.rs
	both modified:   core/src/sigverify_stage.rs
	both modified:   core/src/verified_vote_packets.rs
	both modified:   core/src/window_service.rs
	both modified:   gossip/src/cluster_info.rs
	both modified:   ledger/src/entry.rs
	both modified:   streamer/src/streamer.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

[solana-grimes]

😱 New commits were pushed while the automerge label was present.

[codecov]

Codecov Report

Merging #21804 (d14d45c) into v1.8 (73acae9) will decrease coverage by 0.0%.
The diff coverage is 82.1%.

@@            Coverage Diff            @@
##             v1.8   #21804     +/-   ##
=========================================
- Coverage    81.6%    81.6%   -0.1%     
=========================================
  Files         459      459             
  Lines      130495   130507     +12     
=========================================
- Hits       106546   106545      -1     
- Misses      23949    23962     +13     

[github-actions]

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