Add maven coordinates for transaction-test-lib

Author: dylant-da

sdk/canton/community/daml-lf/transaction/BUILD.bazel

@@ -59,6 +59,7 @@ da_scala_library(
         "@maven//:org_scalaz_scalaz_scalacheck_binding",
     ],
     scalacopts = lf_scalacopts_stricter,
+    tags = ["maven_coordinates=com.daml:daml-lf-transaction-test-lib:__VERSION__"],
     visibility = ["//visibility:public"],
     deps = [
         "//canton/community/daml-lf/api-type-signature",