[osquery:experimental] 3 new commits by Alexander Kindyakov:

<https://github.com/facebook/osquery/commit/86b7ba14e6bd2a8a4959561e32a0a4ec32e9bd67|86b7ba1>

Introduce osquery/experimental directory (#5516) - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/d1985d6f619d804371d455c30f3d04a136152738|d1985d6>

Introduce events stream registry (#5517) - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/4304340fbc5fd32d5c09e0531f832104405c8dbb|4304340>

make poll timeout mamber of the class (#5518) - Alexander Kindyakov