doc/cephadm: improve front matter

- I fixed a sentence that was missing a verb.
- I linked to the Ceph-specific Rook instructions.
- I removed the word "GitHub", because after adding the
  Rook instructions it made the sentence false.

Signed-off-by: Zac Dover <zac.dover@gmail.com>
(cherry picked from commit 608b1bdd42f1da75b43584fa45586575ccef0290)

Merge pull request #48595 from zdover23/wip-doc-2022-10-23-backport-48593-to-pacific

pacific: doc/cephadm: update install.rst

Reviewed-by: Cole Mitchell <cole.mitchell@gmail.com>

doc/cephadm: update install.rst

This commit addresses https://github.com/ceph/ceph/pull/43250,
which has remained unmerged for thirteen months. The issues
raised in that PR are addressed here.

This commit contributes to the simplification of the procedure
that explains how to install cephadm. More remains to be done
on this page, but the old PR had to be dealt with first.

Signed-off-by: Zac Dover <zac.dover@gmail.com>
(cherry picked from commit c8f01d3a32b889a0f3b68f619bfed36f6579c28b)

Merge pull request #48590 from zdover23/wip-doc-2022-10-22-backport-48587-to-pacific

pacifc: doc/cephadm: add prompts to host-management.rst

Reviewed-by: Cole Mitchell <cole.mitchell@gmail.com>

doc/cephadm: add prompts to host-management.rst

This PR adds unselectable prompts to host-management.rst.

Signed-off-by: Zac Dover <zac.dover@gmail.com>
(cherry picked from commit 0ff9e4b9041039160b2d77ce48e29a6fedfaa469)

Merge pull request #48580 from zdover23/wip-doc-2022-10-21-backport-48577-to-pacific

pacific: doc/radosgw: refine "notifications" and "events"

Reviewed-by: Cole Mitchell <cole.mitchell@gmail.com>

doc/radosgw: refine "notifications" and "events"

This commit refines the English in the "Notifications"
and "Events" sections of the notifications.rst page
(the "Bucket Notifications" page).

Signed-off-by: Zac Dover <zac.dover@gmail.com>
(cherry picked from commit b1e589343df4a113d773c4091705e74cd489a1e7)

Merge pull request #48571 from zdover23/wip-doc-2022-10-21-pacific-remove-deduplication

pacific: doc/dev: remove deduplication.rst from pacific

Reviewed-by: Anthony D'Atri <anthony.datri@gmail.com>

doc/dev: remove deduplication.rst from pacific

This PR undoes the backporting of
https://github.com/ceph/ceph/pull/46089 to the Pacific
branch, which backporting was done in
https://github.com/ceph/ceph/pull/48568. Deduplication
does not exist in the pacific branch, so I shouldn't have
backported it.

Signed-off-by: Zac Dover <zac.dover@gmail.com>

Merge pull request #48568 from zdover23/wip-doc-2022-10-21-backport-46089-to-pacific

pacific: doc/dev: add explanation of how to use deduplication

Reviewed-by: Anthony D'Atri <anthony.datri@gmail.com>

doc/dev: add explanation of how to use deduplication

Signed-off-by: Myoungwon Oh <myoungwon.oh@samsung.com>
(cherry picked from commit 72c695780c8361f81b8135899d9060811873dcb4)

Merge pull request #48243 from tserong/wip-57638-pacific

pacific: python-common: Add 'KB' to supported suffixes in SizeMatcher

Reviewed-by: Guillaume Abrioux <gabrioux@redhat.com>