Merge bitcoin/bitcoin#27690: ci: Use credits for ARM task

fa3761d ci: Reduce tsan CPU and memory for faster scheduling (MarcoFalke)
aaaa07b ci: Use credits for ARM task (MarcoFalke)

Pull request description:

  After bitcoin/bitcoin#27562 the task should finish in less than 10 minutes, so also using credits for it will be cheap and improve dev experience.

ACKs for top commit:
  fanquake:
    ACK fa3761d

Tree-SHA512: 98ba76eaa63bcbab674076bb9877b3a20d1b90e6d51e2fd7b97ae245414e984d734006b15ea60228a1f4f9bc72fbe2a1a8910fd05e7c52dd2a8b223bfaa25b50

Author: fanquake

.cirrus.yml

@@ -200,6 +200,7 @@ task:
     docker_arguments:
       CI_IMAGE_NAME_TAG: debian:bullseye
       FILE_ENV: "./ci/test/00_setup_env_arm.sh"
+  << : *CREDITS_TEMPLATE
   env:
     << : *CIRRUS_EPHEMERAL_WORKER_TEMPLATE_ENV
     QEMU_USER_CMD: ""  # Disable qemu and run the test natively
@@ -242,8 +243,8 @@ task:
   name: '[TSan, depends, gui] [lunar]'
   << : *GLOBAL_TASK_TEMPLATE
   container:
-    cpu: 6  # Increase CPU and Memory to avoid timeout
-    memory: 24G
+    cpu: 4
+    memory: 16G  # The default memory is too small, so double everything
     docker_arguments:
       CI_IMAGE_NAME_TAG: ubuntu:lunar
       FILE_ENV: "./ci/test/00_setup_env_native_tsan.sh"
@@ -297,7 +298,7 @@ task:
   << : *GLOBAL_TASK_TEMPLATE
   container:
     cpu: 4
-    memory: 16G  # The default memory is sometimes just a bit too small, so double everything
+    memory: 16G  # The default memory is too small, so double everything
     docker_arguments:
       CI_IMAGE_NAME_TAG: ubuntu:focal
       FILE_ENV: "./ci/test/00_setup_env_i686_multiprocess.sh"