Merge tag 'chr-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

chardev patch queue

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# gpg: Signature made Tue 15 Oct 2024 09:49:53 BST
# gpg:                using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5
# gpg:                issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* tag 'chr-pull-request' of https://gitlab.com/marcandre.lureau/qemu:
  tests/unit/test-char: implement a few mux remove test cases
  chardev/mux: implement detach of frontends from mux
  chardev/mux: switch mux frontends management to bitset
  chardev/mux: introduce `mux_chr_attach_frontend() call
  chardev/mux: convert size members to unsigned int
  chardev/mux: use bool type for `linestart` and `term_got_escape`
  chardev/chardev-internal: remove unused `max_size` struct member
  chardev/char: fix qemu_chr_is_busy() check

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