Update SparseCore Offloading flags

[Obliviour]

xla_sc_disjoint_spmem is no longer needed to be set

Description

Update SC flags with latest recommendation.

Tests

NA

Checklist

Before submitting this PR, please make sure (put X in square brackets):

• [X] I have performed a self-review of my code.
• [X] I have necessary comments in my code, particularly in hard-to-understand areas.
• [X] I have run end-to-end tests tests and provided workload links above if applicable.
• [X] I have made or will make corresponding changes to the doc if needed.