chore(metrics): add instance info for read avg of object operation

[KeXiangWang]

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as titled

Checklist For Contributors

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• I have demonstrated that backward compatibility is not broken by breaking changes and created issues to track deprecated features to be removed in the future. (Please refer to the issue)
• All checks passed in ./risedev check (or alias, ./risedev c)

[codecov]

Codecov Report

Merging #8191 (96725bb) into main (db53272) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #8191   +/-   ##
=======================================
  Coverage   71.78%   71.79%           
=======================================
  Files        1130     1130           
  Lines      181508   181508           
=======================================
+ Hits       130295   130305   +10     
+ Misses      51213    51203   -10     

Flag	Coverage Δ
rust	71.79% <ø> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
...torage/src/hummock/local_version/pinned_version.rs	88.75% <0.00%> (-0.63%)	⬇️
src/meta/src/hummock/mock_hummock_meta_client.rs	65.46% <0.00%> (-0.52%)	⬇️
src/object_store/src/object/mod.rs	48.65% <0.00%> (-0.21%)	⬇️
src/storage/src/hummock/sstable_store.rs	64.77% <0.00%> (-0.16%)	⬇️
src/common/src/cache.rs	97.15% <0.00%> (-0.11%)	⬇️
src/storage/src/hummock/compactor/mod.rs	80.88% <0.00%> (+0.19%)	⬆️
src/batch/src/task/task_execution.rs	52.13% <0.00%> (+0.50%)	⬆️
src/storage/src/hummock/sstable/xor_filter.rs	98.76% <0.00%> (+1.23%)	⬆️
src/batch/src/executor/group_top_n.rs	74.70% <0.00%> (+6.47%)	⬆️

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