feat(IAM Policy Management): Updated role template references changes and test cases

[bbellamgari]

PR summary

This PR includes changes for role_template_references changes for policy template creation.

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Current vs new behavior

Currently we do not support role_template_references in policy templates. With this new behaviour, we are adding that functionality

Does this PR introduce a breaking change?

• Yes
• No

Other information

https://github.ibm.com/IAM/AM-issues/issues/4045

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ bbellamgari
❌ Bhavana Bellamgari

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[pyrooka]

The code was generated into the wrong place. It's in the project root, however it should be in the modules directory. Please fix this! There are almost 400 changes in this PR because of this.

[swcolley]

Code looks good, see comment on goSDK PR (and other SDKs):
IBM/platform-services-go-sdk#418 (review)

This one need CLA like python PR. Maybe just a recheck: #288 (comment)?
Either that or the commit messages need to be signed off as your email and it can verify that you have signed the agreement.

[pyrooka]

Closing this in favor of #289