[Java][FlightRPC] Fix pom.xml for new flight-sql modules

[asfimport]

One of the CI pipelines is failing on the merge branch because of an extra tag.

Reporter: David Li / @lidavidm
Assignee: David Li / @lidavidm

Related issues:

• [Java][FlightSQL] Create stubbed APIs for Flight SQL (relates to)
• [C++][FlightRPC] Implement Flight SQL for C++ (relates to)

PRs and other links:

• GitHub Pull Request #12021
• GitHub Pull Request #12013

_{Note: This issue was originally created as ARROW-15187. Please see the migration documentation for further details.}

[asfimport]

David Li / @lidavidm:
Issue resolved by pull request 12013
#12013