feat!: revert passing operator address on InitChain

[mtsitrin]

PR Standards

Opening a pull request should be able to meet the following requirements

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Close #XXX

<-- Briefly describe the content of this pull request -->

For Author:

• Targeted PR against correct branch
• included the correct type prefix in the PR title
• Linked to Github issue with discussion and accepted design
• Targets only one github issue
• Wrote unit and integration tests
• All CI checks have passed
• Added relevant godoc comments

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For Reviewer:

• confirmed the correct type prefix in the PR title
• Reviewers assigned
• confirmed all author checklist items have been addressed

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After reviewer approval:

• In case targets main branch, PR should be squashed and merged.
• In case PR targets a release branch, PR should be rebased.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.09%. Comparing base (d70f556) to head (2dc783a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #617      +/-   ##
==========================================
- Coverage   44.16%   44.09%   -0.08%     
==========================================
  Files         119      119              
  Lines       16474    16414      -60     
==========================================
- Hits         7276     7237      -39     
+ Misses       8170     8156      -14     
+ Partials     1028     1021       -7     

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