test/e2e: include changestore schema in bazel data deps

The e2e suite_test applies the change schema, but the bazel test target
was missing //extension/changestore/mysql/schema in its data list, so
runfiles didn't ship the .sql file and ApplySchema couldn't find it.

Author: behinddwalls

test/e2e/BUILD.bazel

@@ -7,6 +7,7 @@ go_test(
         "//:MODULE.bazel",
         "//:go.mod",
         "//example/server:docker-compose.yml",
+        "//extension/changestore/mysql/schema",
         "//extension/counter/mysql/schema",
         "//extension/queue/mysql/schema",
         "//extension/storage/mysql/schema",