Move KV cache transforms to new inf optimizer

[h-guo18]

@coderabbitai summary

Description

Issue #98
This PR move kv cache transforms only.

Test Coverage

• TRT-bench:
  with modifications, tp=1:

target branch, tp=1:

Request Throughput (req/sec):                     39.2947
Total Output Throughput (tokens/sec):             5029.7223
Total Token Throughput (tokens/sec):              10059.4446
Total Latency (ms):                               25448.7211
Average request latency (ms):                     19921.6154
Per User Output Throughput [w/ ctx] (tps/user):   6.9288
Per GPU Output Throughput (tps/gpu):              5029.7223

with modification, tp=2:

target branch,tp=2:

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