fix(grpc): add sanity check to trace_tx and trace_call

[thomas-nguy]

Closes: #XXX

Description

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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

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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

Attention: Patch coverage is 21.42857% with 11 lines in your changes missing coverage. Please review.

Project coverage is 46.06%. Comparing base (4fc136e) to head (7b1ad89).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
x/evm/types/query.go	0.00%	7 Missing ⚠️
x/evm/keeper/grpc_query.go	42.85%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #659      +/-   ##
===========================================
- Coverage    46.09%   46.06%   -0.04%     
===========================================
  Files          181      181              
  Lines        18185    18198      +13     
===========================================
  Hits          8382     8382              
- Misses        9078     9090      +12     
- Partials       725      726       +1     

Files with missing lines	Coverage Δ
x/evm/keeper/grpc_query.go	76.56% <42.85%> (-0.84%)	⬇️
x/evm/types/query.go	0.00% <0.00%> (ø)

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