CI: Update deprecated GitHub Actions (#6822)

## Problem

We use a bunch of deprecated actions.
See https://github.com/neondatabase/neon/actions/runs/7958569728
(Annotations section)

```
Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-java@v3, actions/cache@v3, actions/github-script@v6. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.
```

## Summary of changes
- `actions/cache@v3` -> `actions/cache@v4`
- `actions/checkout@v3` -> `actions/checkout@v4`
- `actions/github-script@v6` -> `actions/github-script@v7`
- `actions/setup-java@v3` -> `actions/setup-java@v4`
- `actions/upload-artifact@v3` -> `actions/upload-artifact@v4`

.github/actions/allure-report-generate/action.yml

@@ -59,7 +59,7 @@ runs:
         BUCKET: neon-github-public-dev
 
     # TODO: We can replace with a special docker image with Java and Allure pre-installed
-    - uses: actions/setup-java@v3
+    - uses: actions/setup-java@v4
       with:
         distribution: 'temurin'
         java-version: '17'
@@ -180,7 +180,7 @@ runs:
         fi
 
     - name: Cache poetry deps
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.cache/pypoetry/virtualenvs
         key: v2-${{ runner.os }}-python-deps-${{ hashFiles('poetry.lock') }}
@@ -215,7 +215,7 @@ runs:
           rm -rf ${WORKDIR}
         fi
 
-    - uses: actions/github-script@v6
+    - uses: actions/github-script@v7
       if: always()
       env:
         REPORT_URL: ${{ steps.generate-report.outputs.report-url }}

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

@@ -80,13 +80,13 @@ runs:
 
     - name: Checkout
       if: inputs.needs_postgres_source == 'true'
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 1
 
     - name: Cache poetry deps
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ~/.cache/pypoetry/virtualenvs
         key: v2-${{ runner.os }}-python-deps-${{ hashFiles('poetry.lock') }}