Attempted macOS AArch64 support

[BenjaminAmos]

Description

This pull request attempts to add support for macOS on AArch64 devices (M1/M2 macs). The appropriate native JREs should now be downloaded for this architecture and bundled with the game distribution. This should fix #687.

Testing

• Build a new distribution with gradlew distZipBundleJREs.
• Unzip the distribution on a AArch64 macOS device (M1/M2 mac) and run it with ./solOSX.sh.
• You should be able to play through the game's tutorial in its entirety.

Notes

• This depends on #688.
• These changes are untested, as I do not possess an AArch64 mac to test with.

[BenjaminAmos]

As I've tested this manually on Windows, macOS and Android, I'm confident that this is relatively safe to merge. Two people using M1 macs have confirmed that it works for them.