Install cmake for macos.

Author: kannanjgithub

buildscripts/kokoro/macos.sh

@@ -1,12 +1,14 @@
 #!/bin/bash
 set -veux -o pipefail
+CMAKE_VERSION=3.26.3
 
 if [[ -f /VERSION ]]; then
   cat /VERSION
 fi
 
 readonly GRPC_JAVA_DIR="$(cd "$(dirname "$0")"/../.. && pwd)"
 
+brew install cmake@${CMAKE_VERSION}
 # We had problems with random tests timing out because it took seconds to do
 # trivial (ns) operations. The Kokoro Mac machines have 2 cores with 4 logical
 # threads, so Gradle should be using 4 workers by default.

buildscripts/make_dependencies.sh

@@ -5,7 +5,6 @@ set -evux -o pipefail
 
 PROTOBUF_VERSION=33.1
 ABSL_VERSION=20250127.1
-CMAKE_VERSION=3.26.3
 
 # ARCH is x86_64 bit unless otherwise specified.
 ARCH="${ARCH:-x86_64}"