Switch roave bc-checker from docker to local setup

Author: acrobat

.github/workflows/backwards-compatibility.yml

@@ -12,7 +12,13 @@ jobs:
                 with:
                     fetch-depth: 0
 
-            -   name: Roave BC Check
-                uses: docker://nyholm/roave-bc-check-ga
+            -   name: Install PHP
+                uses: shivammathur/setup-php@v2
                 with:
-                    args: --from=${{ github.event.pull_request.base.sha }}
+                    php-version: '8.2'
+
+            -   name: Install roave/backward-compatibility-check.
+                run: composer require --dev roave/backward-compatibility-check
+
+            -   name: Run roave/backward-compatibility-check.
+                run: vendor/bin/roave-backward-compatibility-check --from=${{ github.event.pull_request.base.sha }}