[Enhance] Enable to toggle whether Gem Pooling is trainable or not.

[yukkyo]

Motivation

Enable to toggle whether Gem Pooling is trainable or not.

reference

Modification

class GeneralizedMeanPooling(nn.Module):
    ...
    def __init__(self, p=3., eps=1e-6, clamp=True, p_trainable=True):
        ...
        if p_trainable:
            self.p = Parameter(torch.ones(1) * p)
        else:
            self.p = p
        ...

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Base: 0.02% // Head: 86.86% // Increases project coverage by +86.83% 🎉

Coverage data is based on head (b362d92) compared to base (b8b31e9).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff              @@
##           dev-1.x    #1246       +/-   ##
============================================
+ Coverage     0.02%   86.86%   +86.83%     
============================================
  Files          121      166       +45     
  Lines         8217    13511     +5294     
  Branches      1368     2148      +780     
============================================
+ Hits             2    11736    +11734     
+ Misses        8215     1420     -6795     
- Partials         0      355      +355     

Flag	Coverage Δ
unittests	86.86% <ø> (+86.83%)	⬆️

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

Impacted Files	Coverage Δ
mmcls/datasets/transforms/compose.py
mmcls/structures/utils.py	77.77% <0.00%> (ø)
mmcls/models/utils/layer_scale.py	86.66% <0.00%> (ø)
mmcls/models/classifiers/timm.py	25.97% <0.00%> (ø)
mmcls/structures/multi_task_data_sample.py	100.00% <0.00%> (ø)
mmcls/models/backbones/beit.py	57.06% <0.00%> (ø)
mmcls/datasets/multi_task.py	74.46% <0.00%> (ø)
mmcls/models/backbones/levit.py	96.06% <0.00%> (ø)
mmcls/models/retrievers/image2image.py	90.90% <0.00%> (ø)
mmcls/models/backbones/revvit.py	64.39% <0.00%> (ø)
... and 157 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

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

[Ezra-Yu]

Please sign the CLA, so that I can review and merge this PR.

[yukkyo]

I signed in from the link above and got to the image below.
Please let me know if there is any other work that needs to be done.

[Ezra-Yu]

It is the commitor who has not signed the CLA.
.

I'm not sure if this account is still in use. There are two solutions：

1. Let this account link an email and then sign the CLA,

2. rebase to modify the commit message including the commitor and email into your accout.

[Ezra-Yu]

LGTM.