ci: Rework dry runs

Make dry runs do everything a regular run would do, except it doesn't
*actually* push nor publish anything. It still extracts release info,
updates PO files, etc.

.github/workflows/release.yml

@@ -39,19 +39,23 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build xdg-desktop-portal
-        if: ${{ !fromJSON(github.event.inputs.dryRun) }}
         run: |
           meson setup . _build
           meson dist -C _build
 
       - name: Update translation files
-        if: ${{ !fromJSON(github.event.inputs.dryRun) }}
+        env:
+          DRY_RUN: ${{ github.event.inputs.dryRun }}
         run: |
           meson setup . _build
           meson compile -C _build/ xdg-desktop-portal-update-po
           git add po/*po
           git commit -m "Update po files"
-          git push
+
+          if [ "$DRY_RUN" = "false" ]; then
+            git push
+          fi
+
           git clean -fxd
 
       - name: Extract release information
@@ -89,11 +93,15 @@ jobs:
           echo $preRelease
 
       - name: Tag release
-        if: ${{ !fromJSON(github.event.inputs.dryRun) }}
+        env:
+          DRY_RUN: ${{ github.event.inputs.dryRun }}
         run: |
           git commit --allow-empty -m $releaseVersion
           git tag $releaseVersion
-          git push --tags
+
+          if [ "$DRY_RUN" = "false" ]; then
+            git push --tags
+          fi
 
       - name: Create release
         if: ${{ !fromJSON(github.event.inputs.dryRun) }}