deprecate BlockProductionMethod::CentralScheduler

[apfitzge]

Problem

• See banking-stage: Remove prio graph scheduler #12009
• We no longer want to support users using prio-graph scheduler

Summary of Changes

• Add deprecation warnings for uses of central-scheduler

Fixes #

[apfitzge]

did not hit it here in the original PR

[mergify]

Backports to the beta branch are to be avoided unless absolutely necessary for fixing bugs, security issues, and perf regressions. Changes intended for backport should be structured such that a minimum effective diff can be committed separately from any refactoring, plumbing, cleanup, etc that are not strictly necessary to achieve the goal. Any of the latter should go only into master and ride the normal stabilization schedule. Exceptions include CI/metrics changes, CLI improvements and documentation updates on a case by case basis.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.2%. Comparing base (b9aa405) to head (c1153d2).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #12033     +/-   ##
=========================================
- Coverage    83.2%    83.2%   -0.1%     
=========================================
  Files         861      861             
  Lines      322317   322327     +10     
=========================================
- Hits       268489   268467     -22     
- Misses      53828    53860     +32     

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