feat: make CongestionControl and Priority hashable

[alokpr]

We would like to use these enums as hash keys and discovered that they were not marked as Hashable

[github-actions]

PR missing one of the required labels: {'dependencies', 'enhancement', 'internal', 'new feature', 'bug', 'breaking-change', 'documentation'}

[alokpr]

CC @JEnoch

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 70.80%. Comparing base (4499d0b) to head (1533e37).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
commons/zenoh-protocol/src/core/mod.rs	0.00%	1 Missing ⚠️
zenoh/src/api/publisher.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2060      +/-   ##
==========================================
- Coverage   70.89%   70.80%   -0.09%     
==========================================
  Files         368      368              
  Lines       62266    62266              
==========================================
- Hits        44142    44090      -52     
- Misses      18124    18176      +52     

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