jammy-amd64-tf-a-build-next: update GCC to 12.3.Rel1

This patch updates the AArch32 bare-metal target (arm-none-eabi)
and AArch64 ELF bare-metal target (aarch64-none-elf) toolchains
to the most recent version (12.3.Rel1).

This helps in testing the toolchain in the staging area, before
the same gets updated in the production.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: I142edcca6e381506e40d5d25110906c73d5f4891
1 file changed