PEGASUS-X (#18551)

* PegasusX Initial commit

* rename

* pegasus X implementation

* pegx update

* pegx fix

* pegasus-x fixes

* pegx updates

* cleanup

* cleanup

* cleanup

* tests

* stylefixes

* Documentation update

* Model hub fix

* cleanup

* update

* update

* testfix

* Check fix

* tweaks for merging

* style

* style

* updates for pr

* style

* change pegasus-x repo

utils/check_repo.py

@@ -82,6 +82,9 @@ IGNORE_NON_TESTED = PRIVATE_MODELS.copy() + [
     "MvpEncoder",  # Building part of bigger (tested) model.
     "PegasusEncoder",  # Building part of bigger (tested) model.
     "PegasusDecoderWrapper",  # Building part of bigger (tested) model.
+    "PegasusXEncoder",  # Building part of bigger (tested) model.
+    "PegasusXDecoder",  # Building part of bigger (tested) model.
+    "PegasusXDecoderWrapper",  # Building part of bigger (tested) model.
     "DPREncoder",  # Building part of bigger (tested) model.
     "ProphetNetDecoderWrapper",  # Building part of bigger (tested) model.
     "RealmBertModel",  # Building part of bigger (tested) model.
@@ -125,6 +128,12 @@ TEST_FILES_WITH_NO_COMMON_TESTS = [
 # should **not** be the rule.
 IGNORE_NON_AUTO_CONFIGURED = PRIVATE_MODELS.copy() + [
     # models to ignore for model xxx mapping
+    "PegasusXEncoder",
+    "PegasusXDecoder",
+    "PegasusXDecoderWrapper",
+    "PegasusXEncoder",
+    "PegasusXDecoder",
+    "PegasusXDecoderWrapper",
     "DPTForDepthEstimation",
     "DecisionTransformerGPT2Model",
     "GLPNForDepthEstimation",