minor #16639 Fix PostgreSQL CI Full to run (Wojdylak)

This PR was merged into the 1.13 branch.

Discussion
----------

| Q               | A
|-----------------|-----
| Branch?         | 1.13
| Bug fix?        | yes
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| Related tickets | #14786
| License         | MIT


Commits
-------
  Fix Full CI to run 2.0

.github/workflows/ci_e2e-pgsql.yaml

@@ -24,8 +24,17 @@ jobs:
         outputs:
             matrix: ${{ steps.matrix.outputs.prop }}
         steps:
-            -   uses: actions/checkout@v4
-            -   name: "Get matrix"
+            -   name: "Checkout (With Branch)"
+                if: "${{ inputs.branch != '' }}"
+                uses: actions/checkout@v4
+                with:
+                    ref: ${{ inputs.branch }}
+
+            -   name: "Checkout"
+                uses: actions/checkout@v4
+                if: "${{ inputs.branch == '' }}"
+            -   
+                name: "Get matrix"
                 id: matrix
                 uses: notiz-dev/github-action-json-property@release
                 with: