[Mgmt] split some modules of azure-mgmt-resource to independent packages

service team split some folders for resources https://github.com/Azure/azure-rest-api-specs/pull/34190 so that python sdk has to split part of modules of `azure-mgmt-resource` into independent package:

1. module `deploymentstacks` of azure-mgmt-resource => azure-mgmt-resource-deploymentstacks
2. module `templatespecs` of azure-mgmt-resource => azure-mgmt-resource-templatespecs
3. module `deploymentscripts` of azure-mgmt-resource => azure-mgmt-resource-deploymentscripts

# Migration
- If SDK users use module like `from azure.mgmt.resource.deploymentstacks import xxx`, they just need to add dependency `azure-mgmt-resource-deploymentstacks` and no code change needed.
- If SDK users use module like `from azure.mgmt.resource import xxx`, they just need to add dependency `azure-mgmt-resource-deploymentstacks` and change code with `from azure.mgmt.resource.deploymentstacks import xxx`

# Release issue

- [x] https://github.com/Azure/sdk-release-request/issues/6276
- [x] https://github.com/Azure/sdk-release-request/issues/6275
- [x] https://github.com/Azure/sdk-release-request/issues/6274
- [x] https://github.com/Azure/sdk-release-request/issues/6209