[BUG] All macOS packages in the repo require macOS 10.15

[pjcreath]

Description
Support for Mojave (and 10.13) was perhaps dropped in 3005. However, all of the packages at (https://repo.saltproject.io/osx/), including 3002 through 3004, fail to run on anything older than 10.15.

The offending configuration seems to be here in 3004.2, but the 3004.1 package still requires 10.15 even though the 3004.1 build code doesn't appear to.

So how did these packages (especially 3004.1 and 3002.8) get built with a minimum target of 10.15 when their build_env.sh says MACOSX_DEPLOYMENT_TARGET=10.13?

Setup

• VM (VMware Fusion) running macOS 10.13 High Sierra
• classic packaging
• trying to use bootstrap to install (FAILING)

Steps to Reproduce the behavior
sudo sh bootstrap-salt.sh -D stable 3002.8

(or 3002.9, 3003.4, 3003.5, 3004.1, 3004.2...you can't specify only a major version, see additional context below.)

Resulting error message

...
 * ERROR: salt-minion was not found running
 * ERROR: Failed to run daemons_running()!!!
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /opt/salt/bin/python3 (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /opt/salt/bin/python3 (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Expected behavior
I would expect salt versions earlier than 3005 to successfully bootstrap on macOS older than 10.15.

Versions Report

bootstrap-salt.sh environment info

 *  INFO: Running version: 2022.08.13
 *  INFO: Executed by: shell pipe
 *  INFO: Command line: 'bootstrap-salt.sh -D'

 *  INFO: System Information:
 *  INFO:   CPU:          VMware7,1
 *  INFO:   CPU Arch:     x86_64
 *  INFO:   OS Name:      Darwin
 *  INFO:   OS Version:   17.7.0
 *  INFO:   Distribution: MacOSX 10.13.6

Additional context
Also, (https://repo.saltproject.io/osx/) is missing symlinks from major versions to their latest minor version. So, for example "sh bootstrap-salt.sh stable 3004" fails with:

 * ERROR: https://repo.saltproject.io/osx/salt-3004-py3-x86_64.pkg failed to download to /tmp/salt-3004-py3-x86_64.pkg
 * ERROR: Failed to run install_macosx_stable()!!!