fix: StreamWriterTest to allow version in trace ID (#12084)

When the source tree of an integration build has non-SNAPSHOT
version, the unit test "testAppendWithMissingValueMap" was failing
because the trace ID contained the version of the artifact.

b/492517601

The conventional commit prefix is “fix:” so that I confirm the effect in
next Release Please pull request after merging this pull request.

Author: suztomo

java-bigquerystorage/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java

@@ -403,7 +403,10 @@ private void verifyAppendRequests(long appendCount) {
         // First request received by server should have schema and stream name.
         assertTrue(serverRequest.getProtoRows().hasWriterSchema());
         assertEquals(TEST_STREAM_1, serverRequest.getWriteStream());
-        assertEquals("java-streamwriter " + TEST_TRACE_ID, serverRequest.getTraceId());
+        // The trace ID would look like "java-streamwriter:3.23.0 DATAFLOW:job_id" if
+        // StreamWriter.getFullTraceId contains the version (non SNAPSHOT version);
+        // otherwise it's "java-streamwriter DATAFLOW:job_id".
+        assertThat(serverRequest.getTraceId()).matches("java-streamwriter(:.+)? " + TEST_TRACE_ID);
       } else {
         // Following request should not have schema and stream name.
         assertFalse(serverRequest.getProtoRows().hasWriterSchema());