Using hostMetadataProvider for CreateOrUpdate call in FunctionController

[soninaren]

Issue describing the changes in this PR

We encountered 500s from the CreateUpdate flow from FunctionController. This was caused because of multiple host restarts that used to happen during this flow. @fabiocav fixed host restarts in this PR. However we still had one remaining when forceRefresh was set to true. This caused the function host to restart and resulted in 500s. The forceRefresh caused host restart while fetching the metadata from function workers. However in this flow we do not need to fetch the metadata from the workers. So to resolve this we are directly using HostMetadataProvider. This prevents the restart and still gives us fresh metadata as we reading the function files again.

Resolves #10631

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