cpanato: ci: use prebuilt node images for CAPG

JobBuild
unknown
07-22 07:45
400
07-21 10:54
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pull-cluster-api-provider-gcp-capi-e2e 1418138033743466496
pull-cluster-api-provider-gcp-conformance 1418129497672126464 1418118177207881728 1418114985954906112 1418114886264688640 1417880123532644352 1417868385517047808
pull-cluster-api-provider-gcp-conformance-ci-artifacts 1418129497638572032 1417886056375652352
pull-cluster-api-provider-gcp-e2e-test 1418128771373862912 1418118209529188352 1418115020998316032 1417880199432769536 1417879460228632576 1417828152775806976 1417806377358725120 1417800171621715968
pull-cluster-api-provider-gcp-make 1418128771323531264 1418118209495633920 1418115020956372992 1417880199361466368 1417879460182495232 1417828152725475328 1417806377291616256 1417800171588161536
pull-cluster-api-provider-gcp-make-conformance 1417813838840991744
pull-cluster-api-provider-gcp-test 1418128771185119232 1418118209441107968 1418115020897652736 1417880199273385984 1417879460102803456 1417828152633200640 1417806377216118784 1417800171500081152