fix: patch message type

[ibrizsabin]

Description:

Reassigned message type integer value to make it backwards compatible with older message format.

Commit Message

fix: patch message type for backwards compatibility

see the guidelines for commit messages.

Changelog Entry

version: <log entry>

Checklist:

• I have performed a self-review of my own code
• I have documented my code in accordance with the documentation guidelines
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have run the unit tests
• I only have one commit (if not, squash them into one commit).
• I have a descriptive commit message that adheres to the commit message guidelines

Please review the CONTRIBUTING.md file for detailed contributing guidelines.

[codecov]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 63.22%. Comparing base (bd26104) to head (1506fe3).

Additional details and impacted files

@@                                Coverage Diff                                 @@
##             development/177-xcall-future-proof-messaging     #278      +/-   ##
==================================================================================
- Coverage                                           65.08%   63.22%   -1.87%     
  Complexity                                             64       64              
==================================================================================
  Files                                                  41       42       +1     
  Lines                                                2346     2586     +240     
  Branches                                               20       20              
==================================================================================
+ Hits                                                 1527     1635     +108     
- Misses                                                809      941     +132     
  Partials                                               10       10              

Flag	Coverage Δ
rust	62.02% <55.55%> (-2.48%)	⬇️
solidity	59.20% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...s/cosmwasm-vm/cw-xcall-lib/src/message/envelope.rs	15.55% <ø> (-1.12%)	⬇️
...ontracts/cosmwasm-vm/cw-xcall/src/types/request.rs	74.80% <100.00%> (-1.20%)	⬇️
...s/cosmwasm-vm/cw-xcall-lib/src/message/msg_type.rs	45.00% <33.33%> (-5.00%)	⬇️

... and 19 files with indirect coverage changes

[AntonAndell]

LGTM