Checkout latest stable pgloader release (#28251)

* Checkout latest stable pgloader release
* Disable Mystql to Postgres migration check

.github/workflows/server-ci-template.yml

@@ -346,7 +346,8 @@ jobs:
           name: server-build-artifact
           path: server/build/
           retention-days: 2
-  test-migration:
-    name: MySQL to PostgreSQL Migration
-    uses: ./.github/workflows/migration.yml
-    secrets: inherit
+  ### Disabled until fixed
+  #test-migration:
+  #  name: MySQL to PostgreSQL Migration
+  #  uses: ./.github/workflows/migration.yml
+  #  secrets: inherit