chore(grafana): add estimated s3 cost

[skyzh]

Signed-off-by: Alex Chi [email protected]

What's changed and what's your intention?

As title

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)

close #2854

[fuyufjh]

💰

[codecov]

Codecov Report

Merging #3000 (c561b95) into main (be82502) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3000   +/-   ##
=======================================
  Coverage   72.97%   72.97%           
=======================================
  Files         724      724           
  Lines       96982    96982           
=======================================
+ Hits        70773    70775    +2     
+ Misses      26209    26207    -2     

Flag	Coverage Δ
rust	72.97% <ø> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
src/meta/src/barrier/mod.rs	65.27% <0.00%> (-0.33%)	⬇️
src/storage/src/hummock/local_version_manager.rs	90.22% <0.00%> (+0.15%)	⬆️
src/storage/src/hummock/compactor.rs	69.68% <0.00%> (+0.17%)	⬆️
src/meta/src/hummock/mock_hummock_meta_client.rs	44.94% <0.00%> (+1.12%)	⬆️

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