Wire lasso metrics up to metrics endpoint

[brandond]

Proposed Changes

Wire lasso metrics up to common registerer/gatherer.

This exposes perf metrics for the Lasso controllers embedded in the supervisor.

Waiting on:

• Expose metrics registration function rancher/lasso#89

Types of Changes

enhancement

Verification

kubectl get --raw /metrics | grep lasso

Testing

Linked Issues

• Expose rancher/lasso controller metrics #10606

User-Facing Change

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.53%. Comparing base (37830fe) to head (0e388a9).
Report is 2 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (37830fe) and HEAD (0e388a9). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (37830fe)	HEAD (0e388a9)
e2etests	9	6

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10528      +/-   ##
==========================================
- Coverage   49.66%   43.53%   -6.14%     
==========================================
  Files         179      179              
  Lines       14936    14938       +2     
==========================================
- Hits         7418     6503     -915     
- Misses       6158     7239    +1081     
+ Partials     1360     1196     -164     

Flag	Coverage Δ
e2etests	36.34% <100.00%> (-10.24%)	⬇️
inttests	36.78% <100.00%> (+17.06%)	⬆️
unittests	13.36% <100.00%> (+0.01%)	⬆️

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