node dra: reduce the number of automatic pre-submit jobs

It's not necessary to cover all possible runtime variants during pre-submit for
all PRs. One of them should be sufficient, the rest can be covered during
periodic testing. This cuts down CI costs and noise in unrelated PRs that
happen to trigger the run_if_changed.

Author: pohly

config/jobs/kubernetes/sig-node/sig-node-presubmit.yaml

@@ -3201,6 +3201,7 @@ presubmits:
     # Not relevant for most PRs.
     always_run: false
     # This covers most of the code related to dynamic resource allocation.
+    # Periodic variant: ci-kind-dra
     run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/
     # The tests might still be flaky or this job might get triggered accidentally for
     # an unrelated PR.
@@ -3257,6 +3258,7 @@ presubmits:
     # Not relevant for most PRs.
     always_run: false
     # This covers most of the code related to dynamic resource allocation.
+    # Periodic variant: ci-kind-dra-all
     run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/
     # The tests might still be flaky or this job might get triggered accidentally for
     # an unrelated PR.
@@ -4276,6 +4278,9 @@ presubmits:
     skip_branches:
     - release-\d+\.\d+  # per-release image
     always_run: false
+    # Automatically testing with one container runtime in one configuration is sufficient to detect basic problems in kubelet early.
+    # CRI-O was picked because it was solid for testing so far.
+    # Periodic variant: ci-node-e2e-crio-cgrpv1-dra-features
     run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/|/test/e2e_node/dra_test.go
     optional: true
     skip_report: false
@@ -4381,7 +4386,10 @@ presubmits:
     skip_branches:
     - release-\d+\.\d+  # per-release image
     always_run: false
-    run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/|/test/e2e_node/dra_test.go
+    # Automatically testing with one container runtime in one configuration is sufficient to detect basic problems in kubelet early.
+    # CRI-O was picked because it was solid for testing so far.
+    # Periodic variant: ci-node-e2e-cgrpv2-crio-dra
+    # run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/|/test/e2e_node/dra_test.go
     optional: true
     skip_report: false
     labels:
@@ -4486,7 +4494,10 @@ presubmits:
     skip_branches:
     - release-\d+\.\d+  # per-release image
     always_run: false
-    run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/|/test/e2e_node/dra_test.go
+    # Automatically testing with one container runtime in one configuration is sufficient to detect basic problems in kubelet early.
+    # CRI-O was picked because it was solid for testing so far.
+    # Periodic variant: ci-node-e2e-containerd-1-7-dra
+    # run_if_changed: /dra/|/dynamicresources/|/resourceclaim/|/resourceclass/|/podscheduling/|/resourceclaimtemplate/|/dynamic-resource-allocation/|/pkg/apis/resource/|/api/resource/|/test/e2e_node/dra_test.go
     optional: true
     skip_report: false
     labels: