refactor: use video block utils from xblocks-contrib package (#38088)

* refactor: use bumper_utils from xblocks-contrib package
* refactor: use video_handlers from xblocks-contrib package
* fix: fix test_video_handlers test cases

openedx/core/djangoapps/video_config/services.py

@@ -29,6 +29,7 @@ from openedx.core.djangoapps.content_libraries.api import (
     add_library_block_static_asset_file,
     delete_library_block_static_asset_file,
 )
+from openedx.core.djangoapps.video_config.sharing_sites import sharing_sites_info_for_video
 from openedx.core.djangoapps.video_config.transcripts_utils import (
     Transcript,
     clean_video_id,
@@ -93,7 +94,6 @@ class VideoConfigService:
 
         organization = get_course_organization(course_key)
 
-        from openedx.core.djangoapps.video_config.sharing_sites import sharing_sites_info_for_video
         sharing_sites_info = sharing_sites_info_for_video(
             public_video_url,
             organization=organization

openedx/core/djangoapps/video_config/transcripts_utils.py

@@ -28,6 +28,7 @@ from xmodule.contentstore.content import StaticContent
 from xmodule.contentstore.django import contentstore
 from xmodule.exceptions import NotFoundError
 
+from xblocks_contrib.video.bumper_utils import get_bumper_settings
 from xblocks_contrib.video.exceptions import TranscriptsGenerationException
 
 
@@ -786,11 +787,6 @@ class VideoTranscriptsMixin:
             is_bumper(bool): If True, the request is for the bumper transcripts
             include_val_transcripts(bool): If True, include edx-val transcripts as well
         """
-        # TODO: This causes a circular import when imported at the top-level.
-        #       This import will be removed as part of the VideoBlock extraction.
-        #       https://github.com/openedx/edx-platform/issues/36282
-        from xmodule.video_block.bumper_utils import get_bumper_settings
-
         if is_bumper:
             transcripts = copy.deepcopy(get_bumper_settings(self).get('transcripts', {}))
             sub = transcripts.pop("en", "")