fix(rollup-relayer): chunk and batch proposer metrics

[colinlyguo]

Purpose or design rationale of this PR

Fix chunk proposer and batch proposer metrics submission.

PR title

Your PR title must follow conventional commits (as we are doing squash merge for each PR), so it must start with one of the following types:

• fix: A bug fix

Deployment tag versioning

Has tag in common/version.go been updated?

• No, this PR doesn't involve a new deployment, git tag, docker image tag
• Yes

Breaking change label

Does this PR have the breaking-change label?

• No, this PR is not a breaking change
• Yes

[codecov]

Codecov Report

Merging #873 (4068dd9) into develop (2840485) will increase coverage by 0.09%.
The diff coverage is 52.38%.

@@             Coverage Diff             @@
##           develop     #873      +/-   ##
===========================================
+ Coverage    51.19%   51.28%   +0.09%     
===========================================
  Files           60       60              
  Lines         5577     5588      +11     
===========================================
+ Hits          2855     2866      +11     
  Misses        2483     2483              
  Partials       239      239              

Flag	Coverage Δ
bridge	63.51% <52.38%> (+0.13%)	⬆️
common	55.43% <ø> (ø)
coordinator	19.15% <ø> (ø)
database	42.85% <ø> (ø)

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

Files Changed	Coverage Δ
...idge/internal/controller/watcher/chunk_proposer.go	67.85% <50.00%> (+1.03%)	⬆️
...idge/internal/controller/watcher/batch_proposer.go	62.50% <57.14%> (+0.73%)	⬆️