MONAI v1.3 release preparation-- MONAILabel sync

[wyli]

• review deprecated API since 1.3 Project-MONAI/MONAI#7018
• bundle starting from local directory #1490
• support of multiple config #1549
• caching github requests Project-MONAI/MONAI#6833 (comment)
• (review segment template https://github.com/ericspod/model-zoo/tree/segment_template/models/segmentation_template)

[matt3o]

"[Deprecated] AddChannel and AsChannelFirst in favor of EnsureChannelFirst" breaks the radiology sample-app as a lot of apps there are using both transforms.
I quickly tried fixing that locally by replacing everything with EnsureChannelFirst and EnsureChannelFirstd, however the test_epistemic.py unittest fails with "ValueError: Metadata not available and channel_dim=None, EnsureChannelFirst is not in use."
I tried to find another transform similar to AddChannel, like UnsqeezeDim but couldn't find any.

[wyli]

fyi the related tutorial updates show potential solutions: Project-MONAI/tutorials#1527

[SachidanandAlle]

Some of the models used in examples for MONAI Label break due to required changes in the infer/train configs.. they are still using delete arguments/transforms

[SachidanandAlle]

#1560

[wyli]

thanks, v1.3 is now available, please create new ticket on further issues