chore: update artman version in CI to 2.0.0 (#3182)
chore: update artman version in CI to 2.0.0 (#3182)


googleapis/gapic-generator,googleapis/gapic-generator,googleapis/gapic-generator,googleapis/gapic-generator,googleapis/gapic-generator,googleapis/gapic-generator,googleapis/gapic-generator