fix(ci): split drone into two separate pipelines for PR and main

.drone.yml

@@ -1,10 +1,9 @@
 kind: pipeline
 type: docker
-name: build-and-push
+name: build-test
 
 trigger:
   event:
-    - push
     - pull_request
 
 steps:
@@ -13,10 +12,18 @@ steps:
     settings:
       dockerfile: Dockerfile
       context: .
-      when:
-        event:
-          - pull_request
+---
+kind: pipeline
+type: docker
+name: build-and-push
 
+trigger:
+  event:
+    - push
+  branch:
+    - main
+
+steps:
   - name: build-and-push
     image: plugins/docker
     settings:
@@ -29,6 +36,3 @@ steps:
         from_secret: REGISTRY_USERNAME
       password:
         from_secret: REGISTRY_PASSWORD
-      when:
-        branch:
-          - main