(PA-8251) Add Puppet Core 8 & 9 support

[AriaXLi]

This commit updates:

• Update install.sh with a newly regenerated install.sh using puppet_agent module with Puppet Core 9 support
• Add --username/-u and --password/-p flags for install.sh when trying to install Puppet Core packages
• Bumps modules/puppet_agent submodule to point to the most recent commit, 81da7da386f4b0c809502112c96de6438f3f7af9
• Add instructions to README.md for using Forge API key and PE License ID when installing Puppet Core packages
• Update Install Puppet workflow and test_install.sh to install Puppet 8 (8.10.0) and Puppet Core 8 & 9 packages on macOS and ubuntu and drop Puppet 7 testing.
• Add Install Puppet (Nightly) workflow to test nightly Puppet Core 8 and 9 packages

[AriaXLi]

Testing install

DMG

macOS 26 x86_64 - Puppet Core 9.0.0 (forge-key)

$ twin-slanderer:~ root# /tmp/install.sh -v 9.0.0 -c puppetcore9 -p $FORGE_KEY
11:55:18 -0700 INFO: Version parameter defined: 9.0.0
11:55:18 -0700 INFO: Downloading Puppet 9.0.0 for mac_os_x...
11:55:18 -0700 INFO: Mac platform! Lets get you a DMG...
...
installer: Package name is puppet-agent
installer: Installing at base path /
installer: The install was successful.
"disk4" ejected.

$ twin-slanderer:~ root# /opt/puppetlabs/bin/puppet --version
9.0.0

macOS 26 ARM64 - Puppet Core 9.0.0 (license-id)

$ pix-arm64-macos26-4:~ root# /tmp/install.sh -v 9.0.0 -c puppetcore9 -u license-id -p $LICENSE_ID
11:26:55 -0700 INFO: Version parameter defined: 9.0.0
11:26:55 -0700 INFO: Downloading Puppet 9.0.0 for mac_os_x...
11:26:55 -0700 INFO: Mac platform! Lets get you a DMG...
...
installer: Package name is puppet-agent
installer: Installing at base path /
installer: The install was successful.
"disk6" ejected.

$ pix-arm64-macos26-4:~ root# /opt/puppetlabs/bin/puppet --version
9.0.0

macOS 26 ARM64 - Puppet Core 8.21.0 (forge key)

$ pix-arm64-macos26-5:~ root# /tmp/install.sh -v 8.21.0 -c puppetcore8 -p $FORGE_KEY
11:03:33 -0700 INFO: Version parameter defined: 8.21.0
11:03:33 -0700 INFO: Downloading Puppet 8.21.0 for mac_os_x...
11:03:33 -0700 INFO: Mac platform! Lets get you a DMG...
...
installer: Package name is puppet-agent
installer: Installing at base path /
installer: The install was successful.
"disk6" ejected.

$ pix-arm64-macos26-5:~ root# /opt/puppetlabs/bin/puppet --version
8.21.0

RPM

Rocky 10 x86_64 - Puppet Core 9.0.0

$ root@muncipal-triol:~# /tmp/install.sh -v 9.0.0 -c puppetcore9 -p $FORGE_KEY
10:01:45 -0700 INFO: Version parameter defined: 9.0.0
10:01:45 -0700 INFO: Downloading Puppet 9.0.0 for el...
10:01:45 -0700 INFO: Red hat like platform! Lets get you an RPM..
...
Installed:
  puppet-agent-9.0.0-1.el10.x86_64

Complete!

$ root@muncipal-triol:~# /opt/puppetlabs/bin/puppet --version
9.0.0

SLES 15 x86_64 - Puppet Core 8.21.0

$ born-methyl:~ # /tmp/install.sh -v 8.21.0 -c puppetcore8 -p $FORGE_KEY
18:09:28 +0100 INFO: Version parameter defined: 8.21.0
18:09:28 +0100 INFO: Downloading Puppet 8.21.0 for SLES...
18:09:28 +0100 INFO: SLES platform! Lets get you an RPM...
...
Retrieving: puppet-agent-8.21.0-1.sles15.x86_64.rpm ..............................................................[done (11.1 MiB/s)]
Checking for file conflicts: ..................................................................................................[done]
(1/1) Installing: puppet-agent-8.21.0-1.sles15.x86_64 .........................................................................[done]
Executing %posttrans scripts ..................................................................................................[done]

$ born-methyl:~ # /opt/puppetlabs/bin/puppet --version
8.21.0

DEB

Ubuntu 26.04 x86_64 - Puppet Core 9.0.0

$ root@newly-polyether:~# /tmp/install.sh -v 9.0.0 -c puppetcore9 -p $FORGE_KEY
18:10:31 +0000 INFO: Version parameter defined: 9.0.0
18:10:31 +0000 INFO: Downloading Puppet 9.0.0 for Ubuntu...
18:10:31 +0000 INFO: Ubuntu platform! Lets get you a DEB...
...
Unpacking puppet-agent (9.0.0-1resolute)…
Setting up puppet-agent (9.0.0-1resolute)…
Created symlink '/etc/systemd/system/multi-user.target.wants/pxp-agent.service' → '/usr/lib/systemd/system/pxp-agent.service'.
Created symlink '/etc/systemd/system/multi-user.target.wants/puppet.service' → '/usr/lib/systemd/system/puppet.service'.
Removed '/etc/systemd/system/multi-user.target.wants/pxp-agent.service'.
Processing triggers for libc-bin (2.43-2ubuntu2)…

Running kernel seems to be up-to-date.

No services need to be restarted.

No containers need to be restarted.

No user sessions are running outdated binaries.

No VM guests are running outdated hypervisor (qemu) binaries on this host.

$ root@newly-polyether:~# /opt/puppetlabs/bin/puppet --version
9.0.0

Debian 12 - Puppet Core 8.21.0

$ root@ip-10-227-4-179:~# /tmp/install.sh -v 8.21.0 -c puppetcore8 -p $FORGE_KEY
18:15:57 +0000 INFO: Version parameter defined: 8.21.0
18:15:57 +0000 INFO: Downloading Puppet 8.21.0 for Debian...
18:15:57 +0000 INFO: Debian platform! Lets get you a DEB...
...
Setting up puppet-agent (8.21.0-1trixie) ...
Created symlink '/etc/systemd/system/multi-user.target.wants/pxp-agent.service' → '/usr/lib/systemd/system/pxp-agent.service'.
Created symlink '/etc/systemd/system/multi-user.target.wants/puppet.service' → '/usr/lib/systemd/system/puppet.service'.
Removed '/etc/systemd/system/multi-user.target.wants/pxp-agent.service'.
Processing triggers for libc-bin (2.41-12) ...

$ root@ip-10-227-4-179:~# /opt/puppetlabs/bin/puppet --version
8.21.0