Add support for Self Service Profile SSO

[duedares-rvj]

🔧 Changes

1. Added a new resource schema auth0_self_service_profile
2. Added a new data source schema auth0_self_service_profile
3. Added relevant expand and flatten rules.
4. Added relevant test cases for data_source and resource.
5. Added test recordings.
6. Added relevant docs and examples.

📚 References

Create a self service profile
Get a self service profile
Update a self-service profile
Delete a self-service profile by Id

🔬 Testing

All relevant test cases has been added for create, get, update and delete functionality through terraform.
Also includes negative testing.

1. testSelfServiceProfileCreate
2. testSelfServiceProfileUpdate
3. testDataResourceWithoutID
4. testDataResourceWithValidID
5. testDataResourceWithInvalidID

make test FILTER=testSelfServiceProfileCreate

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.26087% with 27 lines in your changes missing coverage. Please review.

Project coverage is 90.35%. Comparing base (1d8a8e8) to head (32135dd).

Files	Patch %	Lines
internal/auth0/selfserviceprofile/resource.go	90.08%	8 Missing and 4 partials ⚠️
internal/auth0/selfserviceprofile/expand.go	80.00%	6 Missing and 3 partials ⚠️
internal/auth0/selfserviceprofile/flatten.go	84.61%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #1008    +/-   ##
========================================
  Coverage   90.34%   90.35%            
========================================
  Files         105      109     +4     
  Lines       14341    14571   +230     
========================================
+ Hits        12956    13165   +209     
- Misses        982      996    +14     
- Partials      403      410     +7     

Files	Coverage Δ
internal/auth0/selfserviceprofile/data_source.go	100.00% <100.00%> (ø)
internal/provider/provider.go	100.00% <ø> (ø)
internal/auth0/selfserviceprofile/flatten.go	84.61% <84.61%> (ø)
internal/auth0/selfserviceprofile/expand.go	80.00% <80.00%> (ø)
internal/auth0/selfserviceprofile/resource.go	90.08% <90.08%> (ø)

... and 1 file with indirect coverage changes

[developerkunal]

LGTM