RD: btostautau non-LFV lines

Added in isolation variables and tuning of btostautau lines.

The lines which are being worked on here are:

btostautau_ee_exclusive_hlt2.py
btostautau_exclusive_hlt2.py
btostautau_mue_exclusive_hlt2.py

Total number of lines modified = 105

Bandwidths (RD lines, turbo):

Before changes: 0.688 GB/s

After changes: 0.714 GB/s

Summary of the bandwidth implications:

For sake of brevity, rates are attached as a txt filerates.txt