Revert "[CI] Build PR images on GHCR (#3432)" (#3441)

This reverts commit b65b3f3992.

.github/workflows/elixir.yml

@@ -2,14 +2,8 @@ name: Elixir CI
 
 on:
   push:
-    paths:
-      - "**/*"
-      - "!.github/**" # Important: Exclude PRs related to .github from auto-run
   pull_request:
-    branches: ["master"]
-    paths:
-      - "**/*"
-      - "!.github/**" # Important: Exclude PRs related to .github from auto-run
+    branches: [ "master" ]
 
 jobs:
   lint:
@@ -130,7 +124,7 @@ jobs:
     services:
       db:
         image: postgres:15
-        ports: ["5432:5432"]
+        ports: [ "5432:5432" ]
         env:
           POSTGRES_PASSWORD: postgres
         options: >-