fix: MessageActions adjustments

[arnautov-anton]

🎯 Goal

This change allows rendering CustomMessageActionsList component without having to provide empty customMessageActions object.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 85.49%. Comparing base (28e26ca) to head (18c9b7a). Report is 22 commits behind head on release-v11.

Files with missing lines	Patch %	Lines
src/components/Message/utils.tsx	80.00%	2 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## release-v11 #2472 +/- ## ============================================ Coverage 85.48% 85.49% ============================================ Files 393 395 +2 Lines 9122 9142 +20 Branches 2356 2360 +4 ============================================ + Hits 7798 7816 +18 - Misses 1122 1123 +1 - Partials 202 203 +1 ```

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[stream-ci-bot]

:tada: This PR is included in version 11.23.9 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket:

[stream-ci-bot]

:tada: This PR is included in version 12.0.0-rc.11 :tada:

The release is available on:

• GitHub release
• npm package (@rc dist-tag)

Your semantic-release bot :package::rocket: