add some new ops, fix some operators and add batch operations to certain operators...

add some new ops, fix some operators and add batch operations to certain operators. (ggml/747)

* cuda: fix group_norm

* cuda: add batch inference support for ggml_pad/ggml_upscale

* add ggml_arrange

* add ggml_timestep_embedding

* update ggml_arange/ggml_timestep_embedding tests

* cuda: fix im2col

* add ggml_arange/ggml_timestep_embbeding support for metal backend

* fix some bugs

* fix some bugs

* Update ggml.h

Co-authored-by: Georgi Gerganov <redacted>
* Update ggml-cuda.cu

Co-authored-by: Georgi Gerganov <redacted>
* Update ggml-metal.m

Co-authored-by: Georgi Gerganov <redacted>
* Update ggml-metal.m

Co-authored-by: Georgi Gerganov <redacted>
* Update ggml-metal.metal

Co-authored-by: Georgi Gerganov <redacted>
* modify according to the review comments

* ggml : fix compile warnings + code style

* ggml : normalize compute_forward calls + fix seg fault in debug

* minor

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Co-authored-by: Georgi Gerganov <redacted>
Co-authored-by: slaren <redacted>