RegNet (#16188)

* base model done

* make style

* done

* added files

* Apply suggestions from code review

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* Trigger doc build

* resolved conversations

* resolved conversations

* seer models

* minor changes

* minor changes

* make fixup

* glob variables

* minor changes

* fix copies

* config when possibile

* resolved conflicts

* resolved conflicts

* resolved conflicts

* CI

* conversion script for 10b param

* fixed for 10b model

* minor updates in the doc + make style

* removed unused code

* Apply suggestions from code review

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>

* removed unused code

* removed unused code

* updated modeling_utils from main

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <Sylvain.gugger@gmail.com>

docs/source/en/_toctree.yml

@@ -296,6 +296,8 @@
       title: Reformer
     - local: model_doc/rembert
       title: RemBERT
+    - local: model_doc/regnet
+      title: RegNet
     - local: model_doc/resnet
       title: ResNet
     - local: model_doc/retribert