ci: reduce runner sizes on various jobs

These jobs can use reduced runner size to avoid wasting CPU, as much of
the long-running part of the job is single-threaded.

Suggested in: bitcoin/bitcoin#32989 (comment)

Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>

Author: willcl-ark

.github/workflows/ci.yml

@@ -302,7 +302,7 @@ jobs:
   windows-cross:
     name: 'Linux->Windows cross, no tests'
     needs: runners
-    runs-on: ${{ needs.runners.outputs.use-cirrus-runners == 'true' && 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md' || 'ubuntu-24.04' }}
+    runs-on: ${{ needs.runners.outputs.use-cirrus-runners == 'true' && 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-sm' || 'ubuntu-24.04' }}
     if: ${{ vars.SKIP_BRANCH_PUSH != 'true' || github.event_name == 'pull_request' }}
 
     env:
@@ -433,7 +433,7 @@ jobs:
             file-env: './ci/test/00_setup_env_arm.sh'
 
           - name: 'ASan + LSan + UBSan + integer, no depends, USDT'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-lg' # has to match container in ci/test/00_setup_env_native_asan.sh for tracing tools
+            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md' # has to match container in ci/test/00_setup_env_native_asan.sh for tracing tools
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_asan.sh'
@@ -445,7 +445,7 @@ jobs:
             file-env: './ci/test/00_setup_env_mac_cross.sh'
 
           - name: 'No wallet, libbitcoinkernel'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md'
+            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-sm'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_nowallet_libbitcoinkernel.sh'
@@ -481,7 +481,7 @@ jobs:
             file-env: './ci/test/00_setup_env_native_tidy.sh'
 
           - name: 'TSan, depends, no gui'
-            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-lg'
+            cirrus-runner: 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-md'
             fallback-runner: 'ubuntu-24.04'
             timeout-minutes: 120
             file-env: './ci/test/00_setup_env_native_tsan.sh'
@@ -528,7 +528,7 @@ jobs:
   lint:
     name: 'lint'
     needs: runners
-    runs-on: ${{ needs.runners.outputs.use-cirrus-runners == 'true' && 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-sm' || 'ubuntu-24.04' }}
+    runs-on: ${{ needs.runners.outputs.use-cirrus-runners == 'true' && 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-xs' || 'ubuntu-24.04' }}
     if: ${{ vars.SKIP_BRANCH_PUSH != 'true' || github.event_name == 'pull_request' }}
     timeout-minutes: 20
     env: