GH-49816: [C++][FlightRPC] Only Run ODBC tests on ODBC CI

[alinaliBQ]

Rationale for this change

GH-49816

Only run ODBC tests on ODBC CI for easier maintenance.

What changes are included in this PR?

• CIs that have ODBC enabled (ARROW_FLIGHT_SQL_ODBC: ON) will only run ODBC tests arrow-flight-sql-odbc-test and arrow-odbc-spi-impl-test.
• Only ODBC CIs are affected by this change

Are these changes tested?

• Yes, in CI

Are there any user-facing changes?

N/A

• GitHub Issue: [C++][FlightRPC][ODBC] Only run ODBC tests in ODBC CI #49816

[github-actions]

⚠️ GitHub issue #49816 has been automatically assigned in GitHub to PR creator.

[alinaliBQ]

@lidavidm PR is ready for review

[lidavidm]

Maybe we should add an include_tests, set by env var, to go with exclude_tests, then adjust the CI config to set this via env var? That way we aren't adjusting the test script (which may be used locally as well). On the other hand it seems exclude_tests etc. is also basically only meant for CI, so I'll defer to someone who is more familiar with the CI setup.

[alinaliBQ]

Yea you have a point there, I raised issue #49842 (unassigned) to use an environment variable to adjust exclude/include tests. Since the approach in #49842 is preferred, I’m okay with leaving this PR open or closing it.