dependencies: updating Azure/azure-sdk-for-go, Azure/go-autorest, hashicorp/go-azure-helpers, tombuildsstuff/giovanni

* updating `github.com/Azure/azure-sdk-for-go` to `v45.0.0`
* updating `github.com/Azure/go-autorest` to `v0.11.3`
* updating `github.com/hashicorp/go-azure-helpers` to `v0.12.0`
* updating `github.com/tombuildsstuff/giovanni` to `v0.12.0`