[Fix] Fix a bug of MViT when set with_cls_token to False

[KeepLost]

Resolve the problem when class token is taken away in MViT.

Put more precisely, when with_cls_token and output_cls_token are both set False in model MViT, an error would occur because its MultiScaleBlockand MultiScaleAttention components don't pass the with_cls_token argument from class MViT, and set it True by default.

[CLAassistant]

All committers have signed the CLA.

[cir7]

Thanks for your contribution! this is indeed a bug, we will merge it after review.

[codecov]

Codecov Report

Patch coverage: 80.55% and project coverage change: -0.05 ⚠️

Comparison is base (07259a2) 76.97% compared to head (ca5da02) 76.93%.

❗ Current head ca5da02 differs from pull request most recent head 626332a. Consider uploading reports for the commit 626332a to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2480      +/-   ##
==========================================
- Coverage   76.97%   76.93%   -0.05%     
==========================================
  Files         159      159              
  Lines       12546    12554       +8     
  Branches     2099     2102       +3     
==========================================
+ Hits         9657     9658       +1     
- Misses       2386     2390       +4     
- Partials      503      506       +3     

Flag	Coverage Δ
unittests	76.93% <80.55%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmaction/datasets/transforms/wrappers.py	56.34% <0.00%> (-0.91%)	⬇️
mmaction/models/backbones/mvit.py	78.81% <ø> (ø)
mmaction/models/heads/base.py	80.95% <ø> (ø)
mmaction/models/heads/mvit_head.py	82.85% <50.00%> (-7.47%)	⬇️
mmaction/models/utils/blending_utils.py	90.62% <84.61%> (-1.51%)	⬇️
mmaction/__init__.py	100.00% <100.00%> (ø)
mmaction/evaluation/metrics/acc_metric.py	81.29% <100.00%> (-0.70%)	⬇️
mmaction/models/losses/cross_entropy_loss.py	65.27% <100.00%> (+0.48%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.