Update CI workflows to run on PR for integration

Signed-off-by: Martijn van der Kleijn <martijn.niji@gmail.com>

.woodpecker/build.yml

@@ -6,6 +6,9 @@ when:
     event: push
     path:
       exclude: ['*.md', 'docs/**']
+  - event: [pull_request]
+    path:
+      exclude: ['*.md', 'docs/**']
 
 steps:
   - name: build

.woodpecker/integration.yml

@@ -6,6 +6,9 @@ when:
     event: push
     path:
       exclude: ['*.md', 'docs/**']
+  - event: [pull_request]
+    path:
+      exclude: ['*.md', 'docs/**']
 
 steps:
   - name: verify_connection

.woodpecker/lint.yml

@@ -2,7 +2,9 @@ variables:
   - &golang_image 'golang:1.22'
 
 when:
-  - event: [push, pull_request, manual]
+  - branch: main
+    event: push
+  - event: [pull_request, manual]
 
 steps:
   - name: vendor