Fix message recovery logic and tests

[mitsuaki-u]

What was the problem?

This PR resolves #8613 #8774

How was it solved?

• Fixed unnecessary prehashing before verifying data block
• Update applyRecovery and forwardRecovery to return updated CCM object
• Fixed invalid tests and remove mocking of merkletree.verifyDataBlock to maintain test integrity

How was it tested?

Added and updated relevant tests

[codecov]

Codecov Report

Merging #8778 (d921c99) into release/6.0.0 (d921c99) will not change coverage.
The diff coverage is n/a.

❗ Current head d921c99 differs from pull request most recent head 8fbf4b2. Consider uploading reports for the commit 8fbf4b2 to get more accurate results

Additional details and impacted files

@@              Coverage Diff               @@
##           release/6.0.0    #8778   +/-   ##
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  Coverage          83.33%   83.33%           
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  Files                594      594           
  Lines              22334    22334           
  Branches            3293     3293           
==============================================
  Hits               18612    18612           
  Misses              3722     3722