Bump golangci-lint to 2.15.0 (#6140)

This is needed so that linting works with go 1.27.

.github/workflows/ci.yml

@@ -195,7 +195,7 @@ jobs:
         uses: golangci/golangci-lint-action@ba0d7d2ec06a0ea1cb5fa41b2e4a3ab91d21278a # v9
         with:
           # If you change this, make sure to also update scripts/golangci-lint-shim.sh
-          version: v2.12.2
+          version: v2.15.0
   upload-coverage:
     # List all jobs that produce coverage files
     needs: [unit-tests, integration-tests]

pkg/commands/oscommands/pipeline_test.go

@@ -112,8 +112,14 @@ func TestClosingAPipelinesOutputBringsItDown(t *testing.T) {
 
 	assert.NoError(t, reader.Close())
 
-	done := make(chan error, 1)
-	go func() { done <- pipeline.Wait() }()
+	// Only whether Wait returns matters here, not its error. If a write into a
+	// closed pipe raises a signal, the last command dies of it and Wait reports
+	// that; otherwise the command exits normally.
+	done := make(chan struct{})
+	go func() {
+		_ = pipeline.Wait()
+		close(done)
+	}()
 
 	select {
 	case <-done:

scripts/golangci-lint-shim.sh

@@ -3,6 +3,6 @@
 set -e
 
 # Must be kept in sync with the version in .github/workflows/ci.yml
-version="v2.12.2"
+version="v2.15.0"
 
 go run "github.com/golangci/golangci-lint/v2/cmd/golangci-lint@$version" "$@"