fix minimum diffusers version for LTXPipeline (#1279)

Author: echarlaix

optimum/intel/openvino/modeling_diffusion.py

@@ -86,7 +86,7 @@
     from diffusers.models.vae import DiagonalGaussianDistribution
 
 # Required EncoderDecoderCache object from transformers
-if is_diffusers_version(">=", "0.28.2") and is_transformers_version(">=", "4.45"):
+if is_diffusers_version(">=", "0.32") and is_transformers_version(">=", "4.45"):
     from diffusers import LTXPipeline
 else:
     LTXPipeline = object
@@ -1752,7 +1752,7 @@ def _get_ov_class(pipeline_class_name: str, throw_error_if_not_exist: bool = Tru
 
 OV_TEXT2VIDEO_PIPELINES_MAPPING = OrderedDict()
 
-if is_diffusers_version(">=", "0.28.2") and is_transformers_version(">=", "4.45.0"):
+if is_diffusers_version(">=", "0.32") and is_transformers_version(">=", "4.45.0"):
     OV_TEXT2VIDEO_PIPELINES_MAPPING["ltx-video"] = OVLTXPipeline
     SUPPORTED_OV_PIPELINES.append(OVLTXPipeline)