[Service Catalog] - Portfolio Access, Portfolio Share, and Portfolio Work

[Singha22]

Resolves #8692

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 6 lines in your changes missing coverage. Please review.

Project coverage is 92.77%. Comparing base (415360d) to head (dab8f5b).

Files with missing lines	Patch %	Lines
moto/servicecatalog/models.py	94.91%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #8657    +/-   ##
========================================
  Coverage   92.76%   92.77%            
========================================
  Files        1252     1256     +4     
  Lines      108766   108964   +198     
========================================
+ Hits       100896   101088   +192     
- Misses       7870     7876     +6     

Flag	Coverage Δ
servertests	28.26% <0.00%> (-0.11%)	⬇️
unittests	92.74% <96.96%> (-0.03%)	⬇️

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