set debug based on tracer

[crypto-facs]

Description

Changed default EVM tracer to nil and setting Evm`s debug mode based on tracer.

This will avoid the printing of unnecessary and expensive trace logs without losing debug_traceTransaction support. This will have a big impact on indexer nodes performances.

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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

Merging #746 (b27033e) into main (f42f339) will increase coverage by 0.03%.
The diff coverage is 78.57%.

@@            Coverage Diff             @@
##             main     #746      +/-   ##
==========================================
+ Coverage   55.81%   55.84%   +0.03%     
==========================================
  Files          64       64              
  Lines        5853     5857       +4     
==========================================
+ Hits         3267     3271       +4     
  Misses       2386     2386              
  Partials      200      200              

Impacted Files	Coverage Δ
server/config/config.go	21.48% <0.00%> (ø)
x/evm/types/tracer.go	47.36% <33.33%> (+0.93%)	⬆️
app/app.go	83.80% <100.00%> (ø)
x/evm/keeper/grpc_query.go	66.09% <100.00%> (ø)
x/evm/keeper/keeper.go	75.86% <100.00%> (-0.14%)	⬇️
x/evm/keeper/state_transition.go	76.74% <100.00%> (+0.31%)	⬆️

[fedekunze]

ACK