Changes to Push Distributed Validator partial signed exit message

added the media type application/json for the response with the status 400

added the media type application/json for the response with the status 404

added the media type application/json for the response with the status 409

added the media type application/json for the response with the status 500

added the pattern ^0x[0-9a-fA-F]{130}$ to the request property signature

added the pattern ^0x[0-9a-fA-F]{192}$ to the request property partial_exits/items/signed_exit_message/signature

the share_idx request property's min was set to 1.00

changed the pattern of the request property partial_exits/items/public_key from ^(0x|0h)?[0-9A-F]+$ to ^0x[0-9a-fA-F]{96}$

the partial_exits request property's minItems was increased to 1

added the pattern ^(0x|0h)?[0-9A-F]+$ to the request property partial_exits/items/public_key

api operation id ExitController_postPartialExit removed and replaced with ExitController_postPartialExit[1]_v1

endpoint added