feat: Add setting to disable OOM reporting

[kattrali]

Disables background OOM reporting by default

Changeset

• Added BugsnagConfiguration.reportOOMs config option for disabling out-of-memory event reporting entirely.
• Set BugsnagConfiguration.reportBackgroundOOMs to false by default as its noisy

Tests

• Added new scenarios for the various permutations of OOM config options

Review

• This pull request is ready for:
  • Initial review of the intended approach, not yet feature complete
  • Structural review of the classes, functions, and properties modified
  • Final review

[fractalwrench]

I'm happy with the implementation. It'd be good to target next as this is a feature and not a hot-fix, also we'll need to alter our docs repo.

I'm concerned that the mazerunner scenarios could slow down our CI job, and think it'd be good to check whether there's any faster way of verifying the behaviour before merging.