Replace "kickass" in name generator with "vigorous"

Having curse words in container names can get awkward.

Closes #30374.

Signed-off-by: Steve Dougherty <steve@asksteved.com>

pkg/namesgenerator/names-generator.go

@@ -56,7 +56,6 @@ var (
 		"jolly",
 		"jovial",
 		"keen",
-		"kickass",
 		"kind",
 		"laughing",
 		"loving",
@@ -95,6 +94,7 @@ var (
 		"upbeat",
 		"vibrant",
 		"vigilant",
+		"vigorous",
 		"wizardly",
 		"wonderful",
 		"xenodochial",