Makefile: pin envtest version to avoid needing to bump to go 1.25

Author: wikkyk

Makefile

@@ -181,7 +181,7 @@ ENVTEST ?= $(LOCALBIN)/setup-envtest
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.0.0
 CONTROLLER_TOOLS_VERSION ?= v0.16.5
-ENVTEST_VERSION ?= latest
+ENVTEST_VERSION ?= 42a14a36c13b95dd6bc8b4ba69c181b16d50e3c0 # last version to support go1.24
 
 KUSTOMIZE_INSTALL_SCRIPT ?= "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh"
 .PHONY: kustomize