fix: decode filtered logs in ws (backport: #1781)

[mmsqe]

for more info: evmos#1781

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

Merging #251 (132c405) into release/v0.20.x-cronos (0ea7b86) will decrease coverage by 0.04%.
The diff coverage is 25.00%.

@@                    Coverage Diff                     @@
##           release/v0.20.x-cronos     #251      +/-   ##
==========================================================
- Coverage                   52.56%   52.52%   -0.04%     
==========================================================
  Files                         113      113              
  Lines                       11073    11091      +18     
==========================================================
+ Hits                         5820     5826       +6     
- Misses                       5006     5017      +11     
- Partials                      247      248       +1     

Impacted Files	Coverage Δ
rpc/namespaces/ethereum/eth/filters/api.go	0.00% <0.00%> (ø)
x/evm/types/utils.go	62.16% <30.76%> (-10.57%)	⬇️