[Hotfix] block deep recursive query

[yun-yeo]

Summary of changes

Reject tx which is executing deep recursive query to prevent node crash.

• Set max query depth to 20

Report of required housekeeping

• Github issue OR spec proposal link
• Wrote tests
• Updated API documentation (client/lcd/swagger-ui/swagger.yaml)
• Added a relevant changelog entry: clog add [section] [stanza] [message]

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(FOR ADMIN) Before merging

• Added appropriate labels to PR
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)
• Confirm added tests are consistent with the intended behavior of changes
• Ensure all tests pass

[codecov]

Codecov Report

Merging #584 (08e5a7b) into main (1581f2f) will increase coverage by 0.00%.
The diff coverage is 52.63%.

@@           Coverage Diff           @@
##             main     #584   +/-   ##
=======================================
  Coverage   44.75%   44.75%           
=======================================
  Files         121      122    +1     
  Lines        6998     7011   +13     
=======================================
+ Hits         3132     3138    +6     
- Misses       3620     3627    +7     
  Partials      246      246           

Impacted Files	Coverage Δ
x/wasm/types/wasmer_engine.go	0.00% <0.00%> (ø)
x/wasm/keeper/keeper.go	81.81% <77.77%> (+0.50%)	⬆️
x/wasm/keeper/contract.go	78.84% <100.00%> (+0.24%)	⬆️