[release-11.2.9] Go: Bump to 1.24.2 (#103529)

* Go: Bump to 1.24.2

It is not likely we are actually affected by the CVEs, but updating proactively is not a bad idea nonetheless.

Fixes: CVE-2025-22871
Fixes: https://github.com/grafana/grafana-operator-experience-squad/issues/1311

* CI: Update golangci-lint

(cherry picked from commit 1c4284a8b4)

pkg/api/datasources.go

@@ -407,7 +407,7 @@ func validateLBACHeader(headervalue string) bool {
 		return false
 	}
 	match := pattern.FindSubmatch([]byte(strings.TrimSpace(headervalue)))
-	if match == nil || len(match) < 2 {
+	if len(match) < 2 {
 		return false
 	}
 	_, err = parser.ParseMetricSelector(string(match[1]))