Merge bitcoin#28829: ci: win64 task does use boost:process

5f0bf2e ci: win64 task does use boost:process (fanquake)

Pull request description:

  It passes `--enable-external-signer`.

ACKs for top commit:
  maflcko:
    lgtm ACK 5f0bf2e

Tree-SHA512: 789877aac0d36429f31256adc07812d1914a8a059a43ef22416be97270b083902c253ff0561b3de28e76db005387f14b2712bfcfb1334f69b293c39ce0e7467c

.cirrus.yml

@@ -111,7 +111,7 @@ task:
     FILE_ENV: "./ci/test/00_setup_env_arm.sh"
 
 task:
-  name: 'Win64, unit tests, no gui tests, no boost::process, no functional tests'
+  name: 'Win64, unit tests, no gui tests, no functional tests'
   << : *GLOBAL_TASK_TEMPLATE
   persistent_worker:
     labels: