Move fuse_collectives, fuse_moe, fuse_gemm to new inf optimizer

[h-guo18]

@coderabbitai summary

Description

#98

Test Coverage

• Trt-bench:
  with modification, tp=1:

target branch, tp1=:

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:

Request Throughput (req/sec):                     26.2887
Total Output Throughput (tokens/sec):             3364.9543
Total Token Throughput (tokens/sec):              6729.9085
Total Latency (ms):                               38039.1502
Average request latency (ms):                     29636.2802
Per User Output Throughput [w/ ctx] (tps/user):   4.6821
Per GPU Output Throughput (tps/gpu):              1682.4771

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