[7.0.x] scale tuning (#753)

[knisbet]

• increase apiserver inflight requests for large clusters

• update satellite checkers to reduce api load

• fix typo

• revendor satellite / nethealth testing

• debug nethealth

• revenor satellite

(cherry picked from commit 2fba18e9fb61bfd9270bf3ec15a3d33950157047)