Add PhotonOS icon

[Fryguy]

Closes #869

[Fryguy]

@agrare Even though this adds the icon, I'm not sure what will detect it without it being in the list of normalized operating systems here: https://github.com/ManageIQ/manageiq/blob/master/app/models/operating_system.rb#L13

[miq-bot]

This pull request has been automatically marked as stale because it has not been updated for at least 3 months.

If these changes are still valid, please remove the stale label, make any changes requested by reviewers (if any), and ensure that this issue is being looked at by the assigned/reviewer(s).

[miq-bot]

This pull request has been automatically marked as stale because it has not been updated for at least 3 months.

If these changes are still valid, please remove the stale label, make any changes requested by reviewers (if any), and ensure that this issue is being looked at by the assigned/reviewer(s).

[agrare]

Here is the guestFullName for a photon os vm

[agrare]

@Fryguy I think something like "linux_photon" or "linux_photon_os" would fit better with the existing OS map, https://github.com/ManageIQ/manageiq/pull/23188/files#diff-a529bec9a81ca60f57c0d099561a26d6d90e995ee16d0411ec476ed17a6f6a78R32

[Fryguy]

@agrare Done.

[miq-bot]

Checked commit Fryguy@3a4cf52 with ruby 3.1.5, rubocop 1.56.3, haml-lint 0.51.0, and yamllint
0 files checked, 0 offenses detected
Everything looks fine. 🏆

[Fryguy]

Moved to ManageIQ/manageiq-decorators#107