Chore: Fix various spelling errors in back-end code (#25241)

* Chore: Fix various spelling errors in back-end code
Co-authored-by: Sofia Papagiannaki <papagian@users.noreply.github.com>
Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>>

pkg/plugins/backend_utils.go

@@ -6,7 +6,7 @@ import (
 	"strings"
 )
 
-func ComposePluginStartCommmand(executable string) string {
+func ComposePluginStartCommand(executable string) string {
 	os := strings.ToLower(runtime.GOOS)
 	arch := runtime.GOARCH
 	extension := ""