Update kotlinCompileTesting to v0.7.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ jdk = "21"
 jvmTarget = "1.8"
 kotlin = "2.0.0"
 # No 0.5.0 full release yet due to KSP's 1.0.21 release being busted for CLI/programmatic use
-kotlinCompileTesting = "0.5.0-alpha07"
+kotlinCompileTesting = "0.7.1"
 kotlinpoet = "2.2.0"
 ksp = "2.0.21-1.0.25"