Increase GraalVM builder memory to 14GB

[nscuro]

Description

Increases GraalVM builder memory to 14GB.

Public GitHub Actions runners have 16GB of memory available, but GraalVM per default only uses a conservative chunk of that for building (~50%). Increasing the memory available to GraalVM should hopefully speed up builds.

Addressed Issue

N/A

Additional Details

https://github.blog/news-insights/product-news/github-hosted-runners-double-the-power-for-open-source/

Checklist

• I have read and understand the contributing guidelines
• This PR fixes a defect, and I have provided tests to verify that the fix is effective
• This PR implements an enhancement, and I have provided tests to verify that it works as intended
• This PR introduces changes to the database model, and I have updated the migration changelog accordingly
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +18.14% (target: -1.00%)	✅ ∅ (target: 70.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (47d8fd1)	201	132	65.67%
Head commit (cde2a1b)	6875 (+6674)	5762 (+5630)	83.81% (+18.14%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1519)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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