chore: add PR label migrator action and remove extra pipelines

.github/workflows/label-migrator.yml

@@ -0,0 +1,67 @@
+name: Migrate Labels from Issue to PR
+
+on:
+  pull_request_target:
+    types: [opened, edited]
+
+jobs:
+  migrate-labels:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+      issues: read
+    steps:
+      - name: Migrate Labels
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prBody = context.payload.pull_request.body;
+            if (!prBody) {
+              console.log("No PR body found");
+              return;
+            }
+
+            // Regex to find linked issues like "Fixes #123", "Resolves #123", "Closes #123"
+            const issueRegex = /(?:fix(?:e[sd])?|resolve[sd]?|close[sd]?)\s+#(\d+)/gi;
+            let match;
+            const issueNumbers = [];
+            while ((match = issueRegex.exec(prBody)) !== null) {
+              issueNumbers.push(parseInt(match[1]));
+            }
+
+            if (issueNumbers.length === 0) {
+              console.log("No linked issues found in PR body");
+              return;
+            }
+
+            console.log(`Found linked issues: ${issueNumbers.join(", ")}`);
+
+            const labelsToAdd = new Set();
+
+            for (const issueNumber of issueNumbers) {
+              try {
+                const issue = await github.rest.issues.get({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issueNumber,
+                });
+
+                for (const label of issue.data.labels) {
+                  labelsToAdd.add(label.name);
+                }
+              } catch (error) {
+                console.log(`Could not fetch issue #${issueNumber}: ${error.message}`);
+              }
+            }
+
+            if (labelsToAdd.size > 0) {
+              console.log(`Adding labels: ${Array.from(labelsToAdd).join(", ")}`);
+              await github.rest.issues.addLabels({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.payload.pull_request.number,
+                labels: Array.from(labelsToAdd)
+              });
+            } else {
+              console.log("No labels to migrate");
+            }