Library Compatibility with Protobuf-Java 4.26.x+

[lqiu96]

Protobuf has released v26.x+ which introduces a bunch of breaking changes for Protobuf-Java. Release notes for the version can be found at https://github.com/protocolbuffers/protobuf/releases/tag/v26.0

We have confirmed a few spots that must be updated:

1. TextFormat.shortDebugString in

   java-bigquerystorage/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1beta1/it/ITBigQueryStorageTest.java

   Line 210 in 05ebe17

   TextFormat.shortDebugString(tableReference), session.toString()),

   . This functionality was removed in via this commit: protocolbuffers/protobuf@dfb8a4c
2. TextFormat.shortDebugString in

   java-bigquerystorage/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1beta1/it/ITBigQueryStorageLongRunningTest.java

   Line 105 in 05ebe17

   TextFormat.shortDebugString(tableReference), session.toString()),

   . This functionality was removed in via this commit: protocolbuffers/protobuf@dfb8a4c

A few other areas/ files need to be investigated regarding proto2 syntax:

• https://github.com/googleapis/java-bigquerystorage/blob/05ebe17aeea7e1893e72875486074fa4a912bc27/google-cloud-bigquerystorage/src/test/proto/test.proto
• https://github.com/googleapis/java-bigquerystorage/blob/05ebe17aeea7e1893e72875486074fa4a912bc27/google-cloud-bigquerystorage/src/test/proto/jsonTest.proto
• https://github.com/googleapis/java-bigquerystorage/blob/05ebe17aeea7e1893e72875486074fa4a912bc27/google-cloud-bigquerystorage/src/test/proto/schemaTest.proto

See this doc for the full list of possible code to be migrated/ updated.