fix bug in issue #7650

Resolves https://github.com/ultralytics/yolov5/issues/7638

May help https://github.com/ultralytics/yolov5/issues/7631#issuecomment-1113007451

Improved robustness to filename edge cases like `data/images/zidane.23.jpg` that currently fail. May resolve https://github.com/ultralytics/yolov5/issues/7432

Solution proposed in https://github.com/ultralytics/yolov5/issues/7128 to TRT PyTorch Hub CUDA illegal memory errors.

* PyTorch Hub `_verbose=False` fix2

* Update downloads.py

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May partially resolve concerns in https://github.com/ultralytics/yolov5/pull/7537#discussion_r856843711

* Update restapi.py

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* Add redundant weights download mirrors

This PR seeks to improve access worldwide to YOLOv5 weights. Universal access to AI for all is our core value, and we are against any censorship or restriction efforts.

I've uploaded the official YOLOv5 v6.1 weights to a primary backup bucket on GCP and to secondary backup on Google Drive at https://drive.google.com/drive/folders/1EFQTEUeXWSFww0luse2jB9M1QNZQGwNl. Autodownload with try the first two locations (GitHuB release assets and GCP bucket), and point users to the Google Drive folder if the first two fail.

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* support nomedia

* support nomedia for validation

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* Update train.py

* Revert no plot evolve

evolve plots do not contain any images

* Revert plot_results

contains no media

* Update wandb_utils.py

* sync-bn cleanup

* Cleanup

* Rename nomedia -> noplots

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* Autoinstall TensorRT if missing

May resolve https://github.com/ultralytics/yolov5/issues/7464

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Verified fix for https://github.com/ultralytics/yolov5/pull/7525#issuecomment-1106081123

Follows https://github.com/ultralytics/yolov5/pull/7488. Correct bug where fonts were downloading to current working directory rather than global CONFIG_DIR

* Improved non-latin labels Annotator plotting

May resolve https://github.com/ultralytics/yolov5/issues/7460

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* add progress arg

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* Update val.py

is_coco doesn't work!! '/' -> os.sep!!

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Bumps [cirrus-actions/rebase](https://github.com/cirrus-actions/rebase) from 1.5 to 1.6.
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* add fp16 for coreml using --half

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* add version warning

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* Dynamic normalization layer selection

Based on actual available layers. Torch 1.7 compatible, resolves https://github.com/ultralytics/yolov5/issues/7381

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* Add support for different normalization layers.

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* Update optimizer param group strategy

Avoid empty lists on missing BathNorm2d models as in https://github.com/ultralytics/yolov5/issues/7375

* fix init

Bumps [actions/stale](https://github.com/actions/stale) from 4 to 5.
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Deleting as redundant with FUNDING.yml present in organization repo at https://github.com/ultralytics/.github

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* restore default stride, and set it on argument optional

* fix wrong use of opt

* fix missing parameter of stride

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