[Executorch][perf-ci] Fix perf ci

Summary:
Previous PR #7927 deecoupled max_seq_length from kv cache. That broke
perf ci workflow. Fix that.

Test Plan:
Trigger it manually and check

Reviewers:

Subscribers:

Tasks:

Tags:

[ghstack-poisoned]

Author: kimishpatel

.github/workflows/android-perf.yml

@@ -222,6 +222,7 @@ jobs:
                       --preq_mode 8da4w_output_8da8w \
                       --preq_group_size 32 \
                       --max_seq_length 2048 \
+                      --max_context_length 2048 \
                       --output_name "${OUT_ET_MODEL_NAME}.pte" \
                       -kv \
                       -d fp32 \
@@ -253,6 +254,7 @@ jobs:
                       --xnnpack-extended-ops \
                       -d fp32 \
                       --max_seq_length 2048 \
+                      --max_context_length 2048 \
                       --output_name "${OUT_ET_MODEL_NAME}.pte" \
                       --metadata '{"get_bos_id":128000, "get_eos_ids":[128009, 128001]}'
                     ls -lh "${OUT_ET_MODEL_NAME}.pte"

.github/workflows/apple-perf.yml

@@ -233,6 +233,7 @@ jobs:
                 --preq_mode 8da4w_output_8da8w \
                 --preq_group_size 32 \
                 --max_seq_length 2048 \
+                --max_context_length 2048 \
                 --output_name "${OUT_ET_MODEL_NAME}.pte" \
                 -kv \
                 -d fp32 \
@@ -264,6 +265,7 @@ jobs:
                 --xnnpack-extended-ops \
                 -d fp32 \
                 --max_seq_length 2048 \
+                --max_context_length 2048 \
                 --output_name "${OUT_ET_MODEL_NAME}.pte" \
                 --metadata '{"get_bos_id":128000, "get_eos_ids":[128009, 128001]}'
               ls -lh "${OUT_ET_MODEL_NAME}.pte"