Add integration tests #475
Description
Add integration tests with envtest (or similar) to test meta handler patches.
The goal is to pass is some input that resembles user provided input, possibly a Cluster object with different variables set, and get output of different CAPI objects with the patches applied to them.
Some possible use-cases to test:
- Creating a global image registry mirror
- Air-gapped AWS cluster with unmanaged infra
- FIPS configuration
In order to support this, envtest must run this webhook, the regular CAPI webhook, and any related topology reconcilers.