Description of problem: Grub2 is a large and complex installer supporting a wide range of boot methods. Systemd-boot OTOH is a fairly trivial shim that understands the linux loader syntax and utilizes UEFI system services to pick and boot a linux environment. Systemd-boot is utilized in a couple of places as the primary boot loader as it provides a more standards-oriented boot flow with a smaller attack surface. 

Let's provide an option (hidden from the UI for now) that allows fedora/etc to be installed with systemd-boot rather than grub2. 


Version-Release number of selected component (if applicable): 38+


Expected results: Utilizing a kernel boot line option like "inst.sdboot" a UEFI-capable machine is installed with systemd-boot as its bootloader.


Additional info: Currently, there is a PR: https://github.com/rhinstaller/anaconda/pull/4368 
This defect is being opened to fill in a field for the release readme, and as a discussion point. I will link a couple of supporting defects/PR's as well here.