feat: add limit for eth_call return value

[mmsqe]

Closes: #XXX

Description

Add return limit for eth_call to alleviate memory usage, time result with 100 concurrent single requests

command time --verbose ethermintd start --home exploit0/ethermint_9000-1/node0

No limit:
Maximum resident set size (kbytes): 1800972
Default limit:
Maximum resident set size (kbytes): 530044

---

For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

---

For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #1682 (d3d12c8) into main (f594627) will decrease coverage by 0.03%.
The diff coverage is 33.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1682      +/-   ##
==========================================
- Coverage   68.15%   68.13%   -0.03%     
==========================================
  Files         112      112              
  Lines       10175    10181       +6     
==========================================
+ Hits         6935     6937       +2     
- Misses       2832     2835       +3     
- Partials      408      409       +1     

Impacted Files	Coverage Δ
rpc/backend/call_tx.go	60.58% <25.00%> (-0.47%)	⬇️
server/config/config.go	23.16% <50.00%> (+0.30%)	⬆️

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days-before-close if no further activity occurs.