sidecar: Move some sections to caveats
sidecar: Move some sections to caveats

This commit just move some section to caveats with a clarification on
why it seems enough to do this on each.

Signed-off-by: Rodrigo Campos <6dfa9cecb562e345739f2e4eb69e9ebd0fbff687@kinvolk.io>

kubernetes/enhancements,kubernetes/enhancements,kubernetes/enhancements