fix(metrics): add executor throughput and remove actor throughput

[MingjiHan99]

What's changed and what's your intention?

Remove actor_throughput metric and add executor_throughput metric.
Previous implementation of actor_throughput is incorrect.

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

#2938

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #3045 (783c0aa) into main (4f7206d) will decrease coverage by 0.00%.
The diff coverage is 27.77%.

@@            Coverage Diff             @@
##             main    #3045      +/-   ##
==========================================
- Coverage   73.49%   73.49%   -0.01%     
==========================================
  Files         733      733              
  Lines       99536    99548      +12     
==========================================
+ Hits        73157    73159       +2     
- Misses      26379    26389      +10     

Flag	Coverage Δ
rust	73.49% <27.77%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/stream/src/executor/debug.rs	0.00% <0.00%> (ø)
src/stream/src/executor/debug/trace.rs	0.00% <ø> (ø)
src/stream/src/task/stream_manager.rs	0.00% <0.00%> (ø)
src/stream/src/executor/monitor/streaming_stats.rs	100.00% <100.00%> (ø)
src/storage/src/hummock/local_version_manager.rs	84.28% <0.00%> (+0.15%)	⬆️
src/meta/src/hummock/mock_hummock_meta_client.rs	44.94% <0.00%> (+1.12%)	⬆️

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[skyzh]

Rest LGTM

[skyzh]

please resolve conflict and merge