[CI] Split check types into its own step, use spot for checks (#131096)

.buildkite/pipelines/on_merge.yml

@@ -78,10 +78,19 @@ steps:
 
   - command: .buildkite/scripts/steps/checks.sh
     label: 'Checks'
+    agents:
+      queue: n2-2-spot
+    timeout_in_minutes: 60
+    retry:
+      automatic:
+        - exit_status: '-1'
+          limit: 3
+
+  - command: .buildkite/scripts/steps/check_types.sh
+    label: 'Check Types'
     agents:
       queue: c2-8
-    key: checks
-    timeout_in_minutes: 120
+    timeout_in_minutes: 60
 
   - command: .buildkite/scripts/steps/storybooks/build_and_upload.sh
     label: 'Build Storybooks'

.buildkite/pipelines/pull_request/base.yml

@@ -40,10 +40,19 @@ steps:
 
   - command: .buildkite/scripts/steps/checks.sh
     label: 'Checks'
+    agents:
+      queue: n2-2-spot
+    timeout_in_minutes: 60
+    retry:
+      automatic:
+        - exit_status: '-1'
+          limit: 3
+
+  - command: .buildkite/scripts/steps/check_types.sh
+    label: 'Check Types'
     agents:
       queue: c2-8
-    key: checks
-    timeout_in_minutes: 120
+    timeout_in_minutes: 60
 
   - command: .buildkite/scripts/steps/storybooks/build_and_upload.sh
     label: 'Build Storybooks'

.buildkite/scripts/steps/check_types.sh

@@ -4,6 +4,8 @@ set -euo pipefail
 
 source .buildkite/scripts/common/util.sh
 
+.buildkite/scripts/bootstrap.sh
+
 echo --- Check Types
 checks-reporter-with-killswitch "Check Types" \
   node scripts/type_check

.buildkite/scripts/steps/checks.sh

@@ -13,7 +13,6 @@ export DISABLE_BOOTSTRAP_VALIDATION=false
 .buildkite/scripts/steps/checks/doc_api_changes.sh
 .buildkite/scripts/steps/checks/kbn_pm_dist.sh
 .buildkite/scripts/steps/checks/plugin_list_docs.sh
-.buildkite/scripts/steps/checks/check_types.sh
 .buildkite/scripts/steps/checks/bundle_limits.sh
 .buildkite/scripts/steps/checks/i18n.sh
 .buildkite/scripts/steps/checks/file_casing.sh