updates bastion ami, heaviside commit, and packer file

[dxenes1]

• Updates Bastion AMI
• Downgrades Salt (SPDB build was breaking due to file paths in new version)
• Updates Heaviside reference to work with Python 3.8 and above

[movestill]

@sandyhider didn't spdb work fine with the version of Salt specified (3005)?

[sandyhider]

@sandyhider didn't spdb work fine with the version of Salt specified (3005)?

Looking at my notes, yes.