Create self_hosted_integration_issues.yml

Most of the self hosted tickets are because the user was following cloud docs. Adding a comment to improve that.

Author: sentaur-athena

.github/workflows/self_hosted_integration_issues.yml

@@ -0,0 +1,33 @@
+name: Comment on self-hosted integration issues
+
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: Check if issue contains keywords
+        id: check
+        run: |
+          body="${{ github.event.issue.body }}"
+          shopt -s nocasematch
+          if [[ "$body" == *"self-hosted (https://develop.sentry.dev/self-hosted/)"* && "$body" == *"integration"* && "$body" == *"sentry.io"* ]]; then
+            echo "match=true" >> $GITHUB_OUTPUT
+          else
+            echo "match=false" >> $GITHUB_OUTPUT
+          fi
+      - name: Comment on issue
+        if: steps.check.outputs.match == 'true'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: "Hi! 👋 It looks like you're asking about an integration with self-hosted Sentry. Integrations work differently on self-hosted Sentry so we created separate docs here: https://develop.sentry.dev/integrations/. Please take a look and let us know if you need further help."
+            })