Increase Maven memory limit in CI jobs to avoid failures

[nineinchnick]

Description

Increase Maven memory limit in CI jobs to avoid failures. I ran the build with -Xmx3G for 365 and 370 and the memory usage increased somewhere between these versions.

370 mem usage during build:

365 mem usage during build:

Is this change a fix, improvement, new feature, refactoring, or other?

CI fix

Is this a change to the core query engine, a connector, client library, or the SPI interfaces? (be specific)

CI

How would you describe this change to a non-technical end user or system administrator?

n/a

Related issues, pull requests, and links

• Fixes Timeout or OutOfMemoryError in maven-checks (17) job #11747

Documentation

(x) No documentation is needed.
( ) Sufficient documentation is included in this PR.
( ) Documentation PR is available with #prnumber.
( ) Documentation issue #issuenumber is filed, and can be handled later.

Release notes

(x) No release notes entries required.
( ) Release notes entries required with the following suggested text:

# Section
* Fix some things. ({issue}`issuenumber`)

[nineinchnick]

It might an outlier, but maybe this'll speed up some jobs too. Current branch:

vs master:

[hashhar]

Thanks.

Would be good to know what introduced this anyway - I'll bisect later.