Use samllvec to reduce heap usage, use inline functions and general improvements

[rafaeling]

Improved performance by around 6%

[codecov]

Codecov Report

Attention: Patch coverage is 78.35821% with 29 lines in your changes missing coverage. Please review.

Project coverage is 59.62%. Comparing base (bfcb1e4) to head (33e0d0b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
databroker/src/broker.rs	81.25%	15 Missing ⚠️
databroker/src/grpc/kuksa_val_v1/val.rs	0.00%	8 Missing ⚠️
databroker/src/viss/v2/server.rs	0.00%	5 Missing ⚠️
databroker/src/grpc/kuksa_val_v2/val.rs	96.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
- Coverage   59.62%   59.62%   -0.01%     
==========================================
  Files          33       33              
  Lines       16068    16113      +45     
==========================================
+ Hits         9581     9607      +26     
- Misses       6487     6506      +19     

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[erikbosch]

I assume you should update the lock file as well, or?