microcode_ctl security update

[2:2.1-73.13.0.5]

• ensure UEK also rebuilds initramfs [Orabug: 34280052]
  [2:2.1-73.13.0.3]
• update 06-55-04 to 0x2006d05
• update 06-55-07 to 0x5003302
• update 06-6a-04 to 0xb000280
• update 06-6a-06 to 0xd000375
  [2:2.1-73.13.0.2]
• roll back 06-6a-06 to 0xd0002a0 due to PCIe issues on reset [Orabug: 34076312]
  [2:2.1-73.13.0.1]
• for Intel, do not trigger load if on-disk microcode is not an update [Orabug: 30634727]
• set early_microcode=‘no’ in virtualized guests to avoid early load bugs [Orabug: 30618736]
• ensure late loading fixes are present on 4.1.12-* and 4.14.35-*
• enable early and late load for 5.4.17-*
• enable early loading for 06-4f-01 caveat
• remove no longer appropriate caveats for 06-2d-07 and 06-55-04