AlertingNG: base API implementation (#31824)

* AlertingNG: base API implementation

* Pass the interface instead of the base impl

* Ruler mock draft (WIP)

* Update alerting-api dependency

* Improve mock implementation

pkg/services/ngalert/api/swagger-codegen/Makefile

@@ -0,0 +1,26 @@
+.DEFAULT_GOAL := all
+
+swagger-codegen-api:
+	swagger-codegen generate -v \
+	-i https://grafana.github.io/alerting-api/post.json \
+	-l go-server \
+	-Dapis \
+	-o ../ \
+	--additional-properties packageName=api \
+	-t ./templates \
+	# --import-mappings eval.RelativeTimeRange="github.com/grafana/grafana/pkg/services/ngalert/eval" \
+	# --type-mappings RelativeTimeRange=eval.RelativeTimeRange
+
+copy-files:
+	python move-and-rename.py
+
+fix:
+	sed -i -e 's/apimodels\.\[\]PostableAlert/apimodels.PostableAlerts/' ../go/*.go
+	sed -i -e 's/apimodels\.\[\]UpdateDashboardAclCommand/apimodels.Permissions/' ../go/*.go
+	goimports -w -v ../go/*.go
+	rm ../go/*.go-e
+
+clean:
+	rm -rf ../go
+
+all: swagger-codegen-api fix copy-files clean