[3006.x] Added support and tests for Sys V service files for RedHat family

[dmurphy18]

What does this PR do?

Adds service files for salt-minion, salt-master, salt-syndic and salt-api to /etc/init.d

What issues does this PR fix or reference?

Fixes https://github.com/saltstack/salt/issues/67888

Previous Behavior

Sys V Service files were missing since 3006.0 release

New Behavior

Sys V Service files are now present after installation

Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

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

Commits signed with GPG?

Yes

[twangboy]

Maybe this one needs to go in first... https://github.com/saltstack/salt/pull/67978