Backport of test: fix snapshot save w/ append test for ENT into release/1.15.x#18658

hc-github-team-consul-core wants to merge 3 commits intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/dans/fix-snapshot-save-test/vaguely-solid-sheepdoghashicorp/consul:backport/dans/fix-snapshot-save-test/vaguely-solid-sheepdogCopy head branch name to clipboard