PF tests add default update and import to buildprovider

[VenelinMartinov]

This adds a few additions to the PF test utils:

• Adds an option to buildprovider for tests to provide an import function
• Adds UseStateForUnknown planmodifier to the id property in Create, as that seems to be used almost universally in pf providers in the bridgedProvider util
• Adds a default Update implementation in the bridgedProvider util

Stacked on #2186

[codecov]

Codecov Report

Attention: Patch coverage is 46.66667% with 8 lines in your changes missing coverage. Please review.

Project coverage is 60.66%. Comparing base (c57aebd) to head (cb7a40c).
Report is 1 commits behind head on master.

Files	Patch %	Lines
...f/tests/internal/providerbuilder/build_resource.go	0.00%	5 Missing ⚠️
pf/tests/util.go	70.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2215      +/-   ##
==========================================
- Coverage   60.66%   60.66%   -0.01%     
==========================================
  Files         356      356              
  Lines       46430    46435       +5     
==========================================
+ Hits        28169    28170       +1     
- Misses      16701    16704       +3     
- Partials     1560     1561       +1     

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[t0yv0]

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[t0yv0]

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[pulumi-bot]

This PR has been shipped in release v3.88.0.