fix: Leader election failure to restart (#783)

This fixes the following behavioral issues noted when
testing a leader-aware operator with transient network issues:
- In `LeaderElectionBackgroundService`, if
`elector.RunUntilLeadershipLostAsync()` throws, the exception is not
observed in the library and no further attempts to become the leader
occur. The library now logs any unexpected exceptions and tries to
become the leader again.
- A leader could not stop and then subsequently start being a leader
once more due to cancellation token sources not being recreated. The
library now disposes and recreates the cancellation token sources as
required.
- `LeaderAwareResourceWatcher<TEntity>.StoppedLeading` would erroneously
pass a cancelled cancellation token to `ResourceWatcher<TEntity>`. The
library now passes the `IHostApplicationLifetime.ApplicationStopped`
token to the `ResourceWatcher<TEntity>` - we can assume that
`ApplicationStopped` is a good indication that the stop should no longer
be graceful.

fix(watcher): reconnect after server or client timeout (#780)

This fixes #739.
This closes #771.

Allows the resource watcher to retry the connection until the
cancellation token requests a stop. The watcher caches the
received entities and checks for their keys in a concurrent
dictionary. Recurring "added" events after reconnection
should not trigger a reconciliation.

fix(dependencies): upgrade dependencies and fix namespace in certs (#764

)

chore: upgrade security scanning

fix(release): only use correct releases and no prereleases

Recovery Tag because I screwed semantic release up

feat(kubernetes client): expose original Kubernetes API Client (#749)

fix(client): don't access disposed resources (#738)

This PR is ensuring that the host does not stop with an exception. Those
exceptions were occuring because the `CancellationTokenSource` inside
the hosted services was already disposed when `StopAsync` got called.
The reason for this is that the host invokes `DisposeAsync` **before**
`StopAsync`.

chore: release next version (#736)

chore: add maintenance branches to releaserc