Homebrew bash conflict (on arm64)

[ascheman]

Describe the bug
At least on arm64, if using a recent version of Homebrew, its bash (i.e., /opt/homebrew/bin/bash) is only an 'arm64' binary.
Hence, every internal call to bash will result in an arm64 architecture run of the respective executable/script.
The intended run of dtc (and the internal Java) as implemented by #1031 is nullified.
Instead, the script should explicitly call the dual architecture /bin/bash to ensure the execution remains in the x86_64 universe.

To Reproduce

• Install Homebrew with bash on Apple Silicon
• Run ./dtcw generateSite

Get the following error

arch: posix_spawnp: bash: Bad CPU type in executable