Moderate: grub2 security update (Oracle Linux 7)

[2.02-0.87.0.26.el7.14]
- Replace bugzilla.oracle.com reference [Orabug: 35477723]
- Backport kernel EFI allocation pacthes [Orabug: 34301086]
- Add to the list CVE-2021-3695, CVE-2021-3696, CVE-2021-3697,
CVE-2022-28734, CVE-2022-28735, CVE-2022-28736 [JIRA: OLDIS-16371]
- bump SBAT generation [JIRA: OLDIS-16371]
- Cleanup XEN shell script (Alex Burmashev) [Orabug: 33851417]
- Update SBAT data (Alex Burmashev) [Orabug: 33851417]
- efinet: change SNP open call (Alex Burmashev) [Orabug: 32646964]
- disable buggy 0183-efinet-retransmit-if-our-device-is-busy.patch [Orabug: 27982684]
- Patch multiboot2 to the recent state [Orabug: 32950597]
- Enable multiboot2 for UEFI ( non Secureboot ) mode [Orabug: 32950597]
- Update signing certificate [Orabug: 32670043]
- Update shim and certificates dependencies [Orabug: 32670043]
- xfs: Don't attempt to iterate over empty directory [Orabug: 32584717]
- add SBAT metadata for Oracle Linux grub2
- Use similar format for menu entry in grub environment block
- config file. [Orabug: 32172943]
- Fix degradation in multiboot2 code [Orabug: 32069510]
- Update signing certificate for efi binaries
- Update upstream references [Orabug: 30138841]
- Restore symlink to grub environment file, that was removed during grub2-efi update
if grub2 package is also installed on UEFI machines [Orabug: 27345750]
- fix symlink removal scriptlet, to be executed only on removal [Orabug: 19231481]
- Fix comparison in patch for [Orabug: 18504756]
- Remove symlink to grub environment file during uninstall on EFI platforms [Orabug: 19231481]
- replace dynamic EFI boot folder path generation with predefined 'redhat' (Alex Burmashev)
- Put 'with' in menuentry instead of 'using' [Orabug: 18504756]
- Use different titles for UEK and RHCK kernels [Orabug: 18504756]