[autoparallel] find repeat blocks

[YuliangLiu0306]

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🚨 Issue number

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📝 What does this PR do?

The solving time for auto-parallel intra-op solver is unacceptable for LLMs as the number of layers increasing.

We could do following steps to reduce the solving time for LLMs:

1. Find largest repeated blocks.
2. Use an alias set to force all repeated blocks sharing a same distributed training strategies.

This PR implements a method to find the largest repeated blocks to solve the first issue.

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• [x] I have linked my PR to an issue (instruction)
• [x] My issue clearly describes the problem/feature/proposal, with diagrams/charts/table/code if possible
• [x] I have performed a self-review of my code
• [x] I have added thorough tests.
• [x] I have added docstrings for all the functions/methods I implemented

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[github-actions[bot]]

The code coverage for the changed files is 23%.

Click me to view the complete report

Name                                                                   Stmts   Miss  Cover
------------------------------------------------------------------------------------------
colossalai/auto_parallel/tensor_shard/utils/factory.py                   125    109    13%
tests/test_auto_parallel/test_pass/__init__.py                             0      0   100%
tests/test_auto_parallel/test_tensor_shard/test_find_repeat_block.py      73     44    40%
------------------------------------------------------------------------------------------
TOTAL                                                                    198    153    23%

[github-actions[bot]]

The code coverage for the changed files is 23%.

Click me to view the complete report

Name                                                                   Stmts   Miss  Cover
------------------------------------------------------------------------------------------
colossalai/auto_parallel/tensor_shard/utils/factory.py                   125    109    13%
tests/test_auto_parallel/test_pass/__init__.py                             0      0   100%
tests/test_auto_parallel/test_tensor_shard/test_find_repeat_block.py      73     44    40%
------------------------------------------------------------------------------------------
TOTAL                                                                    198    153    23%

[github-actions[bot]]

The code coverage for the changed files is 23%.

Click me to view the complete report

Name                                                                   Stmts   Miss  Cover
------------------------------------------------------------------------------------------
colossalai/auto_parallel/tensor_shard/utils/factory.py                   123    107    13%
tests/test_auto_parallel/test_pass/__init__.py                             0      0   100%
tests/test_auto_parallel/test_tensor_shard/test_find_repeat_block.py      75     46    39%
------------------------------------------------------------------------------------------
TOTAL                                                                    198    153    23%