Create and Expose SamVisionModel as public for better accessibility (#36493)

* move encoder below

* auto modeling

* write SamVisionTester

* fix vision attention shape

* fix SamVisionTest

* minor changes to SamVisionTest

* Revert "fix vision attention shape"

This reverts commit d2a4083ae5704716e33351aed03af8f3cc45f3ae.

* fix attention output shape in new tests

* remove encoder examples

* run modular on got_ocr2

* code formatting

* fix got_ocr2

* ruff fixes

* code quality

* add sam_vision in auto modeling and auto configuration

* remove composite test

* updated index.md

* add TFSamVisionEncoder to __init__

* fix public TFSamVisionEncoder

* remove outdated todo comment

* set test_torch_exportable

Co-authored-by: Pavel Iakubovskii <qubvel@gmail.com>

* rename: VisionEncoder -> VisionModel

* bring back original SamVisionEncoder

* rename back: VisionEncoderOutput -> VisionModelOutput

* undo changes in SamModelTester

* reuse SamVisionEncoder in SamVisionModel

---------

Co-authored-by: Pavel Iakubovskii <qubvel@gmail.com>

docs/source/en/model_doc/sam.md

@@ -149,12 +149,24 @@ alt="drawing" width="900"/>
 [[autodoc]] SamImageProcessor
 
 
+## SamVisionModel
+
+[[autodoc]] SamVisionModel
+    - forward
+
+
 ## SamModel
 
 [[autodoc]] SamModel
     - forward
 
 
+## TFSamVisionModel
+
+[[autodoc]] TFSamVisionModel
+    - call
+
+
 ## TFSamModel
 
 [[autodoc]] TFSamModel