[Dynamo] Fix lineinfo generation on PY3.11+

[malfet]

• Replace for inst in instructions[0:targe.offset//2]: inst.starts_line = None, with the one that that iterates over all instructions until inst.offset == target.offset condition is met, this way making it uniform across Python bytecode dialects (Python-3.11+ bytecode size is variable, while bytecode size is fixed for older Pythons)
• Speedup target_index search by replacing [i for i in instructions if i.offset == offset][0] with next(i for i in instructions if i.offset == offset), which aborts the evaluation after condition met for the first time, according to:

   In [1]: lst=list(range(10000))
  
   In [2]: %time [i for i in lst if i == 10]
   CPU times: user 144 µs, sys: 23 µs, total: 167 µs
   Wall time: 168 µs
   Out[2]: [10]
  
   In [3]: %time next(i for i in lst if i == 10)
   CPU times: user 6 µs, sys: 0 ns, total: 6 µs
   Wall time: 9.06 µs
   Out[3]: 10

• Fix small typo
• use is_py311_plus variable rather than checking sys.version_info

🤖 Generated by Copilot at 6cd7f27

We fix the typos in our code of doom
We remove the warnings that obscure our vision
We refactor the generate function for the dynamo
We resume the execution with precision

Fixes #103355

cc @voznesenskym @penguinwu @anijain2305 @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @Xia-Weiwen @wenzhe-nrv @jiayisunx @ipiszy @chenyang78 @msaroufim

[pytorch-bot]

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[williamwen42]

We could replace sys.version_info >= (3, 11) checks elsewhere as well.

[malfet]

@pytorchbot merge

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Merge failed

Reason: 1 mandatory check(s) failed. The first few are:

• pull / linux-bionic-py3.11-clang9 / test (default, 2, 3, linux.2xlarge)

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[malfet]

Heh, I need to do linear search, as insn.offset can be None (i.e. offsets are not ascending)

[malfet]

@pytorchbot merge

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