Fix allure report overwriting for different Postgres versions (#4806)

## Problem

We've got an example of Allure reports from 2 different runners for the
same build that started to upload at the exact second, making one
overwrite another

## Summary of changes
- Use the Postgres version to distinguish artifacts (along with the
build type)

.github/actions/run-python-test-set/action.yml

@@ -209,4 +209,4 @@ runs:
       uses: ./.github/actions/allure-report-store
       with:
         report-dir: /tmp/test_output/allure/results
-        unique-key: ${{ inputs.build_type }}
+        unique-key: ${{ inputs.build_type }}-${{ inputs.pg_version }}