jammy-amd64-tf-a-build-next: update armclang to 6.23

Aligns the Armclang version with the one used in the
`jammy-amd64-tf-a-build` Docker image. This image is a
staging fork intended for testing purposes.

Change-Id: I830fb809b0344f72137edfee759c8eb7bc273e05
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
2 files changed