microcode: Update Intel and AMD microcode to November 2023 releases

[foersleo]

Issue number: n/a

Description of changes:

microcode: Update Intel and AMD microcode to November 2023 releases

While we update AMD microcode, we can now drop the downstream backport
of `linux-firmware: Update AMD cpu microcode` from 2023-08-08, in favor
of its upstream variant contained in this update.

Testing done:

AMD

Testing AMD microcode on m7a.metal-48xl instances with Zen4 CPUs, microcode changes from 0x0a10113e (without the update) to 0x0a101144 (with the update) as in the upstream change:

• before

# dmesg | grep microcode
[    1.209514] microcode: microcode updated early to new patch_level=0x0a10113e
[    1.209551] microcode: CPU0: patch_level=0x0a10113e
[    1.209557] microcode: CPU1: patch_level=0x0a10113e
[...]

• after

# dmesg | grep microcode
[    1.226155] microcode: microcode updated early to new patch_level=0x0a101144
[    1.226176] microcode: CPU0: patch_level=0x0a101144
[    1.226190] microcode: CPU1: patch_level=0x0a101144

Intel

Testing Intel microcode on c6i.metal instances with Icelake CPUs, we can see the new microcode version as according to the release notes (0xd0003b9 for Xeon Scalable Gen3):

bash-5.1# dmesg | grep microcode
[    1.699246] microcode: sig=0x606a6, pf=0x1, revision=0xd0003b9

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[foersleo]

⬆️ force push rebases on top of develop to pick up #3599 to fix the failing checks.

[stmcginnis]

Looks good!