* jaeger: add data-plane injection checks
FIxes#5644
This PR adds data-plane checks under `linkerd jaeger check`
which checks for tracing annotation to be present on the
data-plane pod. These can invoked by
`jager check --proxy --namespace xyz`
These are similar to that of the viz data-plane checks.
Signed-off-by: Tarun Pothulapati <tarunpothulapati@outlook.com>