Run hugo via go run and lock its version (#22206)

- Don't rely on obscure docker images like `plugins/hugo`
- Lock down `hugo` to same version the image had used
- Remove unnecessary verbosity in `trans-copy`
- Rename `trans-copy` to `trans-copy.sh`

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: John Olheiser <john+github@jolheiser.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

.drone.yml

@@ -928,11 +928,8 @@ trigger:
 
 steps:
   - name: build-docs
-    image: plugins/hugo:latest
-    pull: always
+    image: golang:1.19
     commands:
-      # https://github.com/drone-plugins/drone-hugo/issues/36
-      - apk upgrade --no-cache libcurl && apk add --no-cache make bash curl
       - cd docs
       - make trans-copy clean build