Adds a way to pull protos from a specific dapr branch

[acroca]

I find it useful to pull specific protos when updating proto files, as we don't always want to pull them from master.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.57%. Comparing base (bffb749) to head (34f69d2).
⚠️ Report is 38 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #828      +/-   ##
==========================================
- Coverage   86.63%   86.57%   -0.06%     
==========================================
  Files          84       90       +6     
  Lines        4473     5215     +742     
==========================================
+ Hits         3875     4515     +640     
- Misses        598      700     +102     

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