Merge tag 'efi-2026-04-rc2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2026-04-rc2

CI: https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/29203

Documentation:

* Remove pip from requirements.txt
* develop/process: Clarify name usage in the Signed-off-by line

UEFI:

* Improve EFI variable load message
* Fix use after free in efi_exit() with tcg2
* Fix efi_debug_image_info_normal allocation
* Add missing EFI_CALL in efi_net