Send remote actions to specific worker pools instead of machine types.

This ensures that nobody else sends requests to the separate worker pool I've set up, so that my performance measurements aren't disturbed.

Closes bazelbuild#15406.

PiperOrigin-RevId: 446988077

BUILD

@@ -213,6 +213,7 @@ REMOTE_PLATFORMS = ("rbe_ubuntu1804_java11",)
         exec_properties = {
             "dockerNetwork": "standard",
             "dockerPrivileged": "true",
+            "Pool": "default",
         },
         parents = ["@" + platform_name + "//config:platform"],
     )
@@ -228,7 +229,7 @@ REMOTE_PLATFORMS = ("rbe_ubuntu1804_java11",)
             "//:highcpu_machine",
         ],
         exec_properties = {
-            "gceMachineType": "e2-highcpu-32",
+            "Pool": "highcpu",
         },
         parents = ["//:" + platform_name + "_platform"],
     )