* Uefi section are creating by `objcopy` with hardcoded sections
offset. This commit allow to have the correct offset between
each part of the efi file, needed to create an UKI. Offsets
are simply calculated so no sections overlap, as recommended
in  https://wiki.archlinux.org/title/Unified_kernel_image#Manually
Moreover, efi stub file's header is parsed to apply the correct
offsets according the section alignment factor.
* Remove EFI_SECTION_VMA_INITRD, no need anymore as initrd
section offset dynamically calculated

Fixes dracutdevs#2275

Signed-off-by: Valentin Lefebvre <[email protected]>

(Cherry-picked commit: f32e95b)

Resolves: #2180787

* UEFI creation didn't handle the ImageBase data for the PE file
  generation. Create an UKI thanks a stub file with a non zero BaseImage
  logs some warning ans generate a bad file offset management. The efi
  becomes unloadable.
* This commit parse the PE file header, get the data and apply the
  ImageBase on the objcopy command.

Fixes dracutdevs#2284

Signed-off-by: Valentin Lefebvre <[email protected]>

(Cherry-picked commit: 6178a9d)

Related: #2180787

strtonum is a gawkism and is not available in all awks, e.g. mawk. Use gawk
to avoid failure.

Fixes: f32e95b
Signed-off-by: Sam James <[email protected]>

(Cherry-picked commit: 33a66ed)

Related: #2180787