tendermint: Allow misformed blocks when decoding them from Protobuf or RPC responses

[romac]

Closes: #1403

• [x] Referenced an issue explaining the need for the change
• [x] Updated all relevant documentation in docs
• [x] Updated all code comments where relevant
• [ ] Wrote tests
• [x] Added entry in .changelog/

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 48.57143% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 59.3%. Comparing base (99ed0b9) to head (d023a5b). Report is 2 commits behind head on main.

:exclamation: Current head d023a5b differs from pull request most recent head 027410f. Consider uploading reports for the commit 027410f to get more accurate results

Files	Patch %	Lines
tendermint/src/block.rs	48.5%	18 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1404 +/- ## ======================================= - Coverage 60.1% 59.3% -0.8% ======================================= Files 271 271 Lines 26221 26545 +324 ======================================= - Hits 15768 15757 -11 - Misses 10453 10788 +335 ```

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