Fix load pretrain weight issue in ResNet

[KumoLiu]

Fixes #7923

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[ericspod]

The bias_downsample value should be bool everywhere from what I gather, however in get_medicalnet_pretrained_resnet_args there's still code treating it like an int, should this be revised as well?

[KumoLiu]

The bias_downsample value should be bool everywhere from what I gather, however in get_medicalnet_pretrained_resnet_args there's still code treating it like an int, should this be revised as well?

Yes, I revised all of them in the latest commit. Could you please help review it again? Thanks!

[KumoLiu]

/build