chore(build): trim default reactor to flight-sql-jdbc-driver chain

[mateusaubin]

Trims the default Maven reactor to only the modules required by arrow-flight-sql-jdbc-driver (bom, format, memory, vector, adapter/jdbc, flight). Remaining upstream modules move to an opt-in full-build profile (mvn -Pfull-build ...).

• ~35% less CPU (~21% wall clock) per clean build
• Both profiles verified green with clean package
• Also switches git-commit-id to native git with tag support so builds work from git worktrees

Linear: COM-668

[Copilot]

Pull request overview

This PR optimizes the default Maven reactor to focus on the arrow-flight-sql-jdbc-driver build chain, moving the remaining upstream modules into an opt-in full-build profile. It also adjusts git-commit-id-plugin to use native git with tag-based describe support to improve compatibility with git worktrees.

Changes:

• Trim the root pom.xml default <modules> list to only the Flight SQL JDBC driver dependency chain, and introduce a full-build profile that restores the removed modules.
• Remove flight-integration-tests from the flight reactor and build it only via the root full-build profile.
• Update git-commit-id-plugin configuration to use native git and enable tag-based git describe.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
pom.xml	Reduces the default reactor module set, adds full-build profile modules, and updates git commit metadata generation configuration.
flight/pom.xml	Excludes flight-integration-tests from the default Flight reactor so it builds only under the root full-build profile.

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