[kmac, rtl/dv/sw] Align error codes

[nasahlpa]

After removing the ErrShadowRegUpdate error (see #25035) only the error code was removed but the error codes of the other errors were not reordered. The reason for this is to ensure that SW still is compatible with the hardware state from the earlgrey_1.0.0 branch.

However, in the future, we also should reorder the following error codes in kmac_pkg.sv:

ErrFatalError from 8'h C1 to 8'h C0
ErrPackerIntegrity from 8'h C2 to 8'h C1
ErrMsgFifoIntegrity from 8'h C3 to 8'h C2

and in dif_kmac.h:

kDifErrorFatalError from 0xC1 to 0xC0
kDifErrorPackerIntegrity from 0xC2 to 0xC1
kDifErrorMsgFifoIntegrity from 0xC3 to 0xC2