CollectHostWithContext was the only collection path (in-cluster support
bundle, remote/SSH host collectors) that never ran collected data through
the redaction engine. A `run` collector's captured environment in
particular can carry credentials verbatim -- e.g. HTTPS_PROXY with
embedded Basic Auth -- straight into the bundle's <collectorName>-info.json
with no redaction applied.
Wire it through collect.RedactResult the same way CollectRemoteWithContext
and pkg/supportbundle/collect.go already do, so the built-in default
redactors apply to local host preflight output too.
Fixes#2100