Merge tag 'pull-qapi-2024-02-26' of https://repo.or.cz/qemu/armbru into staging

Merge tag 'pull-qapi-2024-02-26' of https://repo.or.cz/qemu/armbru into staging

QAPI patches patches for 2024-02-26

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# gpg: Signature made Mon 26 Feb 2024 09:44:05 GMT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* tag 'pull-qapi-2024-02-26' of https://repo.or.cz/qemu/armbru:
  qapi: Divorce QAPIDoc from QAPIParseError
  qapi: Reject multiple and empty feature descriptions
  qapi: Rewrite doc comment parser
  qapi: Merge adjacent untagged sections
  qapi: Call QAPIDoc.check() always
  qapi: Recognize section tags and 'Features:' only after blank line
  qapi: Require descriptions and tagged sections to be indented
  qapi: Reject section heading in the middle of a doc comment
  qapi: Rename QAPIDoc.Section.name to .tag
  qapi: Improve error message for empty doc sections
  qapi: Improve error position for bogus invalid "Returns" section
  qapi: Improve error position for bogus argument descriptions
  sphinx/qapidoc: Drop code to generate doc for simple union branch
  tests/qapi-schema: Cover 'Features:' not followed by descriptions
  tests/qapi-schema: Cover duplicate 'Features:' line
  tests/qapi-schema: Fix test 'QAPI rST doc'
  qapi: Misc cleanups to migrate QAPIs

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>