Integrate meta-guf-distro/fix_fng_collect

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/2a6651e8c481e8c09d07f0a9a03fd6536cdf3fc0

fngsystem: Fixed copy of boot files for i.MX8M

The i.MX8M uses the meta-freescale layer. The layer adds the
KERNEL_IMAGETYPES to the IMAGE_BOOT_FILES. This breaks the copy
operation in the do_collect_files function because we don't handle
the kernel together with the boot files.
The issue is fixed by creating a copy of the IMAGE_BOOT_FILES, removing
the KERNEL_IMAGETYPES and using the copy in the function.

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Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-distro/-/commit/0272dbc33918a3d2e2153d6806956385262ab735

fngsystem: Fixed do_collect_files in fngsystem-image

Since Kirkstone, there is a new way of disabling symlinks of the boot
artifacts (kernel, etc.): To disable the creation of these links, the
variable KERNEL_IMAGETYPE_SYMLINK  can be set to 0. Since we use a FAT
boot partition, links in the boot folder of the image lead to errors during
the extraction of the image and we have to disable them. However, the new
variable also disables the creation of links for the devicetrees and kernel
in the deploy folder.
To solve errors during the package of Flash-N-Go-System, the copy operations
for the boot files and kernel have been changed.