Fix resolve_component_dependencies in single-file bundles (#40780)

Fix resolve_component_dependencies in single-file bundles (#40780)

`hostpolicy_resolve_component_dependencies` uses the same infrastructure in the host as when an application is started. Changes made to the host to support .NET 5 single-file modifies some of the code paths shared with the component dependency resolution and broke it.

When doing component dependency resolution the host must not consider the bundle in any way - all lookups have to go directly against the file system. This change modifies the initialization path to obey this rule.