Tag integration tests as such

Summary:
TSIA. This will let us filter on the tag for CI as need be.
Depends on D7125

Test Plan: N/A

Reviewers: nserrino, michelle, #engineering, zasgar

Reviewed By: #engineering, zasgar

Differential Revision: https://phab.corp.pixielabs.ai/D7171

GitOrigin-RevId: 459a2ac7e56d81a99d0eb4fe53831460eca2b360

src/vizier/utils/datastore/BUILD.bazel

@@ -12,6 +12,7 @@ go_test(
     size = "small",
     srcs = ["datastore_test.go"],
     embed = [":go_default_library"],
+    tags = ["integration"],
     deps = [
         "//src/utils/testingutils:go_default_library",
         "//src/vizier/utils/datastore/etcd:go_default_library",