Recommended update for grub2

This update for grub2 fixes the following issues:

- Fix error `grub_file_filters not found` in Azure virtual machine. (bsc#1182012)
- Fix executable stack marking in `grub-emu`. (bsc#1181696)
- Remove `95_textmode` for PowerPC given that there's no efi port on that architecture. (bsc#1174166)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Fixed bugs
bnc#1182012
VM is not booting with error : ‘error: symbol `grub_file_filters' not found.’ - SFSC 00273385 - ref:_00D1igLOd._5001iYKnRA:ref
bnc#1174166
Leap15.2 installed not detected by petitboot on PowerPC baremetal
bnc#1181696
grub files flagged with executable stack [ref:_00D1igLOd._5001iYJHvD:ref]
Selected Binaries
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