Enable errorlint linter

See https://github.com/polyfloyd/go-errorlint#examples

Signed-off-by: Tom Wieczorek <[email protected]>

Author: twz123

.golangci.yml

@@ -10,10 +10,11 @@ run:
 
 linters:
   enable:
-    - depguard # Checks if package imports are in a list of acceptable packages
-    - gofmt    # Checks whether code was gofmt-ed
-    - goheader # Checks is file headers matche a given pattern
-    - revive   # Stricter drop-in replacement for golint
+    - depguard  # Checks if package imports are in a list of acceptable packages
+    - errorlint # Find code that will cause problems with Go's error wrapping scheme
+    - gofmt     # Checks whether code was gofmt-ed
+    - goheader  # Checks is file headers matche a given pattern
+    - revive    # Stricter drop-in replacement for golint
 
 linters-settings:
   depguard:

pkg/component/controller/workerconfig/reconciler_test.go

@@ -583,7 +583,7 @@ func TestReconciler_runReconcileLoop(t *testing.T) {
 
 	underTest.runReconcileLoop(ctx, updates, nil)
 
-	switch ctx.Err() {
+	switch ctx.Err() { //nolint:errorlint // as per context contract
 	case context.Canceled:
 		break // this is the good case
 	case context.DeadlineExceeded: