fix: confirm when deleting template (#2866)

* prompt for confirmation before deleting templates (#2830)

* populate templateNames from the interactive picker too

* allow skipping delete confirmation prompt with --yes flag

* eliminate unnecessary newline

* test both confirmation of delete and `--yes` with no confirmation

* fix failing test that needed --yes

* remove unnecessary empty line the linter disliked

* make the tests correct

cli/templatecreate_test.go

@@ -229,6 +229,7 @@ func TestTemplateCreate(t *testing.T) {
 				"templates",
 				"delete",
 				"my-template",
+				"--yes",
 			}
 			cmd, root := clitest.New(t, args...)
 			clitest.SetupConfig(t, client, root)