Add allow host access to Graaljs under flags

[tokou]

Context

https://github.com/mobile-dev-inc/maestro/pull/1996#issuecomment-2324679424

Proposed changes

• I also added MAESTRO_CLI_DANGEROUS_GRAALJS_ALLOW_ALL_ACCESS for allowAllAccess()
• I added a disabled integration test for the case where the env var needs to be set as I don't think it's possible to mock System.env.
• (Unrelated) Fix to .idea/.gitignore

Testing

• Unit tests for truthness of env values
• Integration tests

Issues fixed

Linked https://github.com/mobile-dev-inc/maestro/pull/1949 Linked https://github.com/mobile-dev-inc/maestro/pull/1996 Fixes https://github.com/mobile-dev-inc/maestro/issues/1388