Implement shim.InstanceDiff for v2InstanceDiff2

[VenelinMartinov]

No description provided.

[VenelinMartinov]

This change is part of the following stack:

• implement shim.Provider for planResourceChangeImpl #2867
  • Remove PRC Dispatch provider #2868
    • Implement shim.InstanceDiff for v2InstanceDiff2 #2869 ◀
      • Remove v2Provider and v2InstanceDiff #2870
        • Implement shim.Resource for v2Resource2 #2872
          • Remove v2Resource and v2ResourceMap #2873
            • Remove v2 Instance State #2874

_{Change managed by git-spice.}

[codecov]

Codecov Report

Attention: Patch coverage is 82.14286% with 5 lines in your changes missing coverage. Please review.

Project coverage is 67.37%. Comparing base (15578b7) to head (70237a9).

Files with missing lines	Patch %	Lines
pkg/tfshim/sdk-v2/provider2.go	82.14%	5 Missing ⚠️

Additional details and impacted files

@@                         Coverage Diff                          @@
##           vvm/remove_prc_dispatch_provider    #2869      +/-   ##
====================================================================
- Coverage                             67.39%   67.37%   -0.03%     
====================================================================
  Files                                   327      327              
  Lines                                 41833    41844      +11     
====================================================================
- Hits                                  28193    28191       -2     
- Misses                                12053    12066      +13     
  Partials                               1587     1587              

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