Update Search Txs by Events APIs

[alexanderbez]

closes: #4633

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• 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.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry: clog add [section] [stanza] [message]

• rereviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[fedekunze]

Can we update the swagger file comments 🙏 ? I believe GET /txs has a reference to tags too.

[alexanderbez]

@fedekunze updated. Thanks.

[codecov]

Codecov Report

Merging #4637 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #4637   +/-   ##
=======================================
  Coverage   54.11%   54.11%           
=======================================
  Files         260      260           
  Lines       16371    16371           
=======================================
  Hits         8859     8859           
  Misses       6866     6866           
  Partials      646      646

[fedekunze]

👍 ACK. Let's remove the required field and then update the docs again