Adding `ORTPipelineForxxx` entrypoints (#1960)
* created auto task mappings
* added correct auto classes
* created auto task mappings
* added correct auto classes
* added ort/auto diffusion classes
* fix ORTPipeline detection
* start test refactoring
* dynamic dtype
* support torch random numbers generator
* compact diffusion testing suite
* fix
* test
* test
* test
* use latent-consistency architecture name instead of lcm
* fix
* add ort diffusion pipeline tests
* added dummy objects
* remove duplicate code
* support testing without diffusers
* remove unnecessary
* revert
* style
* remove model parts from optimum.onnxruntime
