This commit prepares the 0.23.0 release, this involves 2 steps first
changing all the version numbers to 0.23.0 from 0.23.0rc1 and secondly
updating the release notes to prepare them for publishing.

One key thing to note is that this PR removes the 0.22.0 release notes.
This is because for the 0.22.0rc1 tag we neglected to move the release
notes to a separate directory. So when we did that for the 0.22.0 final
release we had to forward port this back to main so that any backports
to stable/0.22 would be backportable (see Qiskit#8901). However, this causes
reno to detect all the 0.22 release notes are incorrectly as part of the
0.23.0 development series. To fix this the simplest path forward was to
remove the 0.22.0 release notes from the 0.23.0 branch (as in this PR).

Co-authored-by: Julien Gacon <gaconju@gmail.com>

One release note to call out is the release note for Qiskit#8568 has been
changed significantly. This is based on Qiskit#9445 which is reverting some
breaking changes made as part of Qiskit#8568.

Co-authored-by: Kevin Hartman <kevin@hart.mn>

Co-authored-by: Jake Lishman <jake@binhbar.com>

…4.yaml