v3.0: receive_and_buffer with external_worker (backport of #9212)

[mergify]

Problem

• receive_and_buffer uses root bank for both ALT loading and vote-only checking,
• External worker uses receive_and_buffer code to translate transaction,

Summary of Changes

• use working bank for vote-only checking, root for ALT loading
• update External worker accordingly

Fixes #

---

This is an automatic backport of pull request #9212 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of f3a5a32 has failed:

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Unmerged paths:
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	both modified:   core/src/banking_stage/consume_worker.rs
	both modified:   core/src/banking_stage/transaction_scheduler/receive_and_buffer.rs

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

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.4%. Comparing base (5a06890) to head (54ce715).

Additional details and impacted files

@@            Coverage Diff            @@
##             v3.0    #9266     +/-   ##
=========================================
- Coverage    83.4%    83.4%   -0.1%     
=========================================
  Files         810      810             
  Lines      366228   366228             
=========================================
- Hits       305683   305682      -1     
- Misses      60545    60546      +1     

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[tao-stones]

Backport note: not trivia backporting, the "external worker" code not exist in 3.0; simply picking the change for using working_bank for VO.

[t-nelson]

this one-liner is sufficient?

[tao-stones]

this one-liner is sufficient?

Yes, it's this one liner - use working bank for vote-only checking, while root for ALT loading is existing behavior.

Have to add additional parameter to function(s) in 3.1+

[t-nelson]

Yes, it's this one liner - use working bank for vote-only checking, while root for ALT loading is existing behavior.

Have to add additional parameter to function(s) in 3.1+

take me back

[t-nelson]

@OliverNChalk mind providing sme review here too?