Fix typos in orch comments

Author: Benjamin Reed

testctrl/svc/orch/executor.go

@@ -17,7 +17,7 @@ import (
 // Executors can run a test session by provisioning its components, monitoring
 // its health and cleaning up after its termination.
 type Executor interface {
-	// Execute runs a test session. It accepts a context, which can prevent
+	// Execute runs a test session. It accepts a context that can prevent
 	// problematic sessions from running indefinitely.
 	//
 	// An error is returned if there is a problem regarding the test itself.

testctrl/svc/orch/watcher.go

@@ -29,7 +29,7 @@ type Watcher struct {
 	wi              watch.Interface
 }
 
-// WatcherOptions overrides the defaults of the controller, allowing it to be
+// WatcherOptions overrides the defaults of the watcher, allowing it to be
 // configured as needed.
 type WatcherOptions struct {
 	// EventBufferSize specifies the size of the buffered channel for each