Parallelize maven builds by default

[ZacBlanco]

Description

Adding these parameters defaults all maven builds from this directory to using a parallelized mode if running on a multi-core machine. It can significantly improve build performance when compiling multiple modules.

Motivation and Context

Faster builds without having to write -T 1C for every maven command.

Impact

Potentially faster builds. Console output may be intertwined which can make following errors more difficult

Test Plan

N/A

Contributor checklist

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• [x] PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
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• [x] Adequate tests were added if applicable.
• [ ] CI passed.

Release Notes

== NO RELEASE NOTE ==