Refactor the subscriptions api to meet standard mount approach #879

Job	Run time
License Check / license-check	29s
E2E Tests / Build Docker image	1m 51s
Lint / golangci-lint	1m 28s
Go Module Check / ensure go mod is tidy	11s
Run Unit Tests / unit_tests (1.22.x, ubuntu-latest)	39s
Test Docker Publish / Build and Push Docker Image	1m 41s
Run Unit Tests / unit_tests (1.22.x, macos-latest)	41s
Run Unit Tests / test_coverage	2m 24s
Run Unit Tests / unit_tests (1.22.x, windows-latest)	3m 16s
E2E Tests / Run Tests	4m 46s
	17m 26s

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