API: Extract OpenAPI specification from source code using go-swagger (#40528) (#45061)

* API: Using go-swagger for extracting OpenAPI specification from source code

* Merge Grafana Alerting spec

* Include enterprise endpoints (if enabled)

* Serve SwaggerUI under feature flag

* Fix building dev docker images

* Configure swaggerUI

* Add missing json tags

Co-authored-by: Ying WANG <ying.wang@grafana.com>
Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
(cherry picked from commit 35fe58de37)

Dockerfile

@@ -11,7 +11,7 @@ COPY plugins-bundled plugins-bundled
 
 RUN yarn install
 
-COPY tsconfig.json .eslintrc .editorconfig .browserslistrc .prettierrc.js babel.config.json ./
+COPY tsconfig.json .eslintrc .editorconfig .browserslistrc .prettierrc.js babel.config.json .linguirc ./
 COPY public public
 COPY tools tools
 COPY scripts scripts
@@ -30,6 +30,7 @@ COPY go.mod go.sum embed.go Makefile build.go package.json ./
 COPY cue cue
 COPY packages/grafana-schema packages/grafana-schema
 COPY public/app/plugins public/app/plugins
+COPY public/api-spec.json public/api-spec.json
 COPY pkg pkg
 COPY scripts scripts
 COPY cue.mod cue.mod