add WithRenameFunction() view ClauseOption

[kristinapathak]

Description: Add a more flexible way to rename metrics when multiple instruments are matching on the same regular expression.

Link to tracking Issue: #505

Testing: Current unit tests for WithName() also test the new WithRenameFunction() due to WithName() using it. I can add more tests if desired.

Documentation: comments

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01% ⚠️

Comparison is base (c94b43c) 89.40% compared to head (7b0d962) 89.39%.

❗ Current head 7b0d962 differs from pull request most recent head 764e1c6. Consider uploading reports for the commit 764e1c6 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #504      +/-   ##
==========================================
- Coverage   89.40%   89.39%   -0.01%     
==========================================
  Files          62       62              
  Lines        3595     3593       -2     
==========================================
- Hits         3214     3212       -2     
  Misses        287      287              
  Partials       94       94              

Files Changed	Coverage Δ
lightstep/sdk/metric/view/views.go	100.00% <ø> (ø)
...ghtstep/sdk/metric/internal/viewstate/viewstate.go	97.68% <100.00%> (-0.02%)	⬇️
lightstep/sdk/metric/view/clause.go	100.00% <100.00%> (ø)

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