Update doc "report an issue" button

Attempt to fix #17176 by:
- Creating a new template for doc issues
- Populating the "page link" field with a full link (domain + path)
- Updating labels

Closes #17177.

PiperOrigin-RevId: 508553013
Change-Id: I2d52125eb9b8a6efd1f3fe3e2be8cfe4ad2d8230

.github/ISSUE_TEMPLATE/doc_issue.yml

@@ -0,0 +1,22 @@
+name: bazel.build doc issue
+description: File a documentation issue through bazel.build's "Report an Issue" button
+body:
+  - type: input
+    id: link
+    attributes:
+      label: >
+        Page link:
+  - type: textarea
+    id: desc
+    attributes:
+      label: >
+        Problem description (include actual vs expected text, if applicable):
+  - type: textarea
+    id: location
+    attributes:
+      label: >
+        Where do you see this issue? (include link to specific section of the page, if applicable)
+  - type: textarea
+    id: extras
+    attributes:
+      label: Any other information you'd like to share?

site/en/_buttons.html

@@ -1,4 +1,4 @@
-<a class="button button-with-icon" href="https://github.com/bazelbuild/bazel/issues/new?title=%5Bbazel.build%5D+Problem+with+{% dynamic print request.path %}&labels=type%3A%20documentation%20%28cleanup%29" target="_blank">
+<a class="button button-with-icon" href="https://github.com/bazelbuild/bazel/issues/new?title=%5Bbazel.build%5D+Problem+with+{% dynamic print request.path %}&labels=team-Documentation&template=doc_issue.yml&link=https%3A%2F%2Fbazel.build{% dynamic print request.path %}" target="_blank">
   Report an issue<span class="material-icons icon-after" aria-hidden="true">open_in_new</span>
 </a>
 {% dynamic if not setvar.source_file %}