[Test] Fix LoRA perf configurations of different GPUs

[erhoo82]

Tune LM3 LoRA performance configs for different GPUs

[erhoo82]

Assigned to Sanju

[erhoo82]

@rhmukundan found that we are using LoRA to both QKV and MLP blocks.
Fixing to have it only in QKV block to match what we had before.

[rhmukundan]

MRs associated with this effort:

• LLAMA3 70B: LoRa enabled in all modules instead of only LinearQKV #2181
• Enabling TP Comm Overlap and Packed Sequencing Configs for LLAMA3 70B… #2247
• Update LLAMA3 70B LoRa Base Configs for GB300, GB200 and H100 #2265