[master] Allow accessing the regular mine/event bus from salt-ssh

[lkubb]

What does this PR do?

• Allows the mine wrapper to access the regular mine
• Allows the publish wrapper to access the regular event bus

What issues does this PR fix or reference?

Fixes: #40943
Fixes: #65645

Note:

• The second issue asks for this functionality in the title, but assumes it would make the x509.certificate_managed state work on SSH minions. This is not the case. The publish wrapper can be used to emulate its behavior somewhat though by writing a wrapper for the x509 execution module.
• This also fixes an issue where passing non-string arg to publish.publish for SSH minions just crashes: {'retcode': 1, 'stderr': 'Traceback (most recent call last):\n File "<string>", line 2, in <module>\n File "<string>", line 427, in <module>\n File "<string>", line 384, in main\nAttributeError: \'int\' object has no attribute \'startswith\'\n', 'stdout': '/usr/bin/scp\n'}

Previous Behavior

salt-ssh and regular Salt are strictly separated, except during pillar rendering

New Behavior

Data from regular Salt can be accessed in salt-ssh

Merge requirements satisfied?

• Docs
• Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• Tests written/updated

Commits signed with GPG?

Yes