[characterizaton] add new Delay Error Profile from S4-250217 and support for predetermined offset

S4-250217 provides a new delay error profile I1.

IVAS 8-b F.23 Experiment P800-23 requires offsets:

• O1, a random number
• O2, (O1+4000) \mod{8000}

The new profile and support for a specified offset should be added.