common/options: extract osd and mgr settings out

common/options: extract osd and mgr settings out

the purposes of this change are:

* faster compilation, so the cmake generator can process .yaml.in files
  in parallel.
* allow daemons to include a subset of options which it is interested
  in.
* better maintainability. by grouping options in different .yaml.in
  files, developers understand who are the consumers of an option.

in this change, options only read by mgr are extracted into mgr.yaml.in,
and options only read by osd are extracted into osd.yaml.in.

so all options in mgr.yaml.in should have "services: mgr" in their
definition by default. the ones in osd.yaml.in have "services: osd".

in the case where options are consumed by multiple services or tools,
the option should add "common" to its "services" if it is supposed to be
consumed by a tool, or "mon" if it is read by monitor as well.

but it takes time to audit all the options, so only part of them are
processed.

Signed-off-by: Kefu Chai <kchai@redhat.com>