Plugins: Externalise Azure Monitor data source (#79545)

* Set up frontend linting for Azure

- Fix final frontend import
- Fix other lint issues

* Add Azure Monitor to backend linting

* Remove featuremgmt dependency

* Add intervalv2 to list of disallowed imports

* Remove config dependency

- Replace with function from azure-sdk

* Remove util dependency

* Duplicate interval functionality from core

* Add required backend wrappers

* Update frontend

* Add testing helper

* Add missing package

* Bump minimum grafana dependency

* Fix dependency

* Regen cue

* Fix lint

* Update expected response file

* Update import and dependency

.golangci.toml

@@ -52,10 +52,13 @@ deny = [
   { pkg = "github.com/grafana/grafana/pkg/server", desc = "Core plugins are not allowed to depend on Grafana core packages" },
   { pkg = "github.com/grafana/grafana/pkg/tests", desc = "Core plugins are not allowed to depend on Grafana core packages" },
   { pkg = "github.com/grafana/grafana/pkg/web", desc = "Core plugins are not allowed to depend on Grafana core packages" },
+  { pkg = "github.com/grafana/grafana/pkg/tsdb/intervalv2", desc = "Core plugins are not allowed to depend on Grafana core packages" },
 ]
 files = [
   "**/pkg/tsdb/grafana-testdata-datasource/*",
   "**/pkg/tsdb/grafana-testdata-datasource/**/*",
+  "**/pkg/tsdb/azuremonitor/*",
+  "**/pkg/tsdb/azuremonitor/**/*",
   "**/pkg/tsdb/parca/*",
   "**/pkg/tsdb/parca/**/*",
 ]