fix: bless on Rosetta capable environments(arm64)

[SReject]

Issue:
- bless doesn't support --openfolder for Apple Silicon based architectures.
- With Rosetta transcoding the current check of os.arch() returns x86; this is why #205 did not solve the issue.
- Other node-native potential checks also fail to identify Apple Silicon environments

Fix:
- Check sysctl.proc_translated and if it has a value assume the machine is Rosetta-capable and thus Apple Silicon

Implementation:
- use sysctl command to retrieve the value of sysctl.proc_translated. If a value is returned it can be assumed the machine is Rosetta-capable.
- Do not use --openfolder when Rosetta-capability has been assumed.

Tests:
- MacBook Air, 2020 (M1)
- MacBook Pro, 2021 (M1 Pro)

Addresses:
#216, #218, #219

[jjeff]

Giving this a nudge.

By default, Github Actions Runner runs in Rosetta mode on Apple Silicon devices. This means that currently, node-appdmg won't work in a Ventura CI build environment.