Relocate reconcilers from wksctl to CAPEI (cluster-api-provider-existinginfra)

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Co-authored-by: Jerry Jackson <jerry@weave.works>

Use runtime-controller client interface

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Remove bogus taint check in controller

Fetch machine identity fewer times

Code was checking the `Value` of the taint, whereas the string
"NoSchedule" is an `Effect`.  So it would always be false.

Exclude node being updated from HA check

Use the generic Serializer in libgitops, and fix some API machinery nits

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>

Signed-off-by: Dennis Marttinen <dennis@weave.works>