shutdowned -> stopped
use shutdown everywhere
use patch in taints api call
use notimplemented in clouds use AddOrUpdateTaintOnNode
correct log text
add fake cloud
try to fix bazel
add shutdown tests
add context
This adds context to all the relevant cloud provider interface signatures.
Callers of those APIs are currently satisfied using context.TODO().
There will be follow on PRs to push the context through the stack.
For an idea of the full scope of this change please look at PR #58532.
