program-runtime: drop metrics

[buffalojoec]

Removes the single use of the solana-metrics dependency from program-runtime, ensuring all SVM crates no longer need solana-svm-metrics.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.1%. Comparing base (0c3bf69) to head (c47c353).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #7807     +/-   ##
=========================================
- Coverage    83.1%    83.1%   -0.1%     
=========================================
  Files         808      808             
  Lines      356469   356464      -5     
=========================================
- Hits       296288   296228     -60     
- Misses      60181    60236     +55     

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[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.