Support swin/bert with dynamic batch

[Njuapp]

Signed-off-by: Cheng Hang calvinhance@gmail.com

Description

To support dynamic-batch compilation of swin transformer/BERT, I have added dynamic batch support of the following relevant op converters:

1. aten::reshape
2. aten::select
3. aten::roll
4. aten::flatten
5. aten::slice The older version can support dynamic shape, but will report a lot of trt ERRORs, meanwhile compiles successfully. This can be reproduced for TRT 8.4, and it did not appear for TRT 8.2. I suppose it is caused by some new checks performed in TRT8.4.
   
   To resolve this issue, I have slightly changed the order of codes for dynamic slice, and it did not change the logics. By such simple manipulation, the ERRORs disappear.

Fixes #1271

Type of change

Please delete options that are not relevant and/or add your own.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes
• I have added the relevant labels to my PR in so that relevant reviewers are notified