[autoparallel] add overlap option

[YuliangLiu0306]

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[github-actions]

The code coverage for the changed files is 12%.

Click me to view the complete report

Name                                                          Stmts   Miss  Cover
---------------------------------------------------------------------------------
colossalai/auto_parallel/passes/runtime_preparation_pass.py     293    272     7%
colossalai/auto_parallel/tensor_shard/initialize.py              98     72    27%
---------------------------------------------------------------------------------
TOTAL                                                           391    344    12%