[Port] TensorFlow implementation of Mistral (#29708)

* chore: initial commit

* chore: adding imports and inits

* chore: adding the causal and classification code

* chore: adding names to the layers

* chore: using single self attn layer

* chore: built the model and layers

* chore: start with testing

* chore: docstring change, transpose fix

* fix: rotary embedding

* chore: adding cache implementation

* remove unused torch

* chore: fixing the indexing issue

* make fix-copies

* Use modeling_tf_utils.keras

* make fixup

* chore: fixing tests

* chore: adding past key value logic

* chore: adding multi label classfication test

* fix: switching on the built parameters in the layers

* fixing repo consistency

* ruff formats

* style changes

* fix: tf and pt equivalence

* removing returns from docstrings

* fix docstrings

* fix docstrings

* removing todos

* fix copies

* fix docstring

* fix docstring

* chore: using easier rotate_half

* adding integration tests

* chore: addressing review related to rotary embedding layer

* review changes

* [run-slow] mistral

* skip: test save load after resize token embedding

* style

---------

Co-authored-by: Matt <rocketknight1@gmail.com>

docs/source/en/index.md

@@ -200,7 +200,7 @@ Flax), PyTorch, and/or TensorFlow.
 |                 [Megatron-BERT](model_doc/megatron-bert)                 |       ✅        |         ❌         |      ❌      |
 |                 [Megatron-GPT2](model_doc/megatron_gpt2)                 |       ✅        |         ✅         |      ✅      |
 |                       [MGP-STR](model_doc/mgp-str)                       |       ✅        |         ❌         |      ❌      |
-|                       [Mistral](model_doc/mistral)                       |       ✅        |         ❌         |      ✅      |
+|                       [Mistral](model_doc/mistral)                       |       ✅        |         ✅         |      ✅      |
 |                       [Mixtral](model_doc/mixtral)                       |       ✅        |         ❌         |      ❌      |
 |                         [mLUKE](model_doc/mluke)                         |       ✅        |         ❌         |      ❌      |
 |                           [MMS](model_doc/mms)                           |       ✅        |         ✅         |      ✅      |

docs/source/en/model_doc/mistral.md

@@ -216,4 +216,19 @@ A list of official Hugging Face and community (indicated by 🌎) resources to h
 ## FlaxMistralForCausalLM
 
 [[autodoc]] FlaxMistralForCausalLM
-    - __call__
+    - __call__
+
+## TFMistralModel
+
+[[autodoc]] TFMistralModel
+    - call
+
+## TFMistralForCausalLM
+
+[[autodoc]] TFMistralForCausalLM
+    - call
+
+## TFMistralForSequenceClassification
+
+[[autodoc]] TFMistralForSequenceClassification
+    - call