[Res/Policy] Add built in policy definition/set definition paths

[AutorestCI]

Generated from RestAPI PR: Azure/azure-rest-api-specs#1788

[vivsriaus]

@lmazuel I'm unable to see the CI failure on this. Can you please help with this? Thanks

[vivsriaus]

@lmazuel Looks like the CI is failing because of casing issue when executing tests (I changed policydefinitions to policyDefinitions):

CannotOverwriteExistingCassetteException: No match for the request (<Request (PUT) https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/providers/Microsoft.Authorization/policyDefinitions/pypolicyea4a13f0?api-version=2016-12-01>) was found. Can't overwrite existing cassette ('/home/travis/build/Azure/azure-sdk-for-python/azure-mgmt/tests/recordings/test_mgmt_resource_policy.test_policy_definition.yaml') in your current record mode ('none').

[codecov-io]

Codecov Report

Merging #1507 into master will decrease coverage by 0.06%.
The diff coverage is 19.46%.

@@            Coverage Diff             @@
##           master    #1507      +/-   ##
==========================================
- Coverage   54.41%   54.34%   -0.07%     
==========================================
  Files        3572     3571       -1     
  Lines       87857    87947      +90     
==========================================
- Hits        47808    47799       -9     
- Misses      40049    40148      +99

Impacted Files	Coverage Δ
..._12_01/operations/policy_definitions_operations.py	45.31% <19.46%> (-51.16%)	⬇️
...ure/mgmt/batchai/models/custom_toolkit_settings.py	100% <0%> (ø)	⬆️
...mgmt-batchai/azure/mgmt/batchai/models/__init__.py	100% <0%> (ø)	⬆️
...t-batchai/azure/mgmt/batchai/models/file_server.py	100% <0%> (ø)	⬆️
...mt-redis/azure/mgmt/redis/operations/operations.py	40% <0%> (ø)	⬆️
...is/azure/mgmt/redis/operations/redis_operations.py	27.16% <0%> (ø)	⬆️
...mgmt/redis/operations/firewall_rules_operations.py	37.5% <0%> (ø)	⬆️
...batchai/models/batch_ai_management_client_enums.py	100% <0%> (ø)	⬆️
...chai/azure/mgmt/batchai/models/output_directory.py	100% <0%> (ø)	⬆️
... and 3 more

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