Change the message that is logged when a required extension is not
loaded or found from "Extension not autoloaded: <extension id>" to
"Required extension not found or not loaded: <extension id>".
Change the message that is logged when the extension manager has an
error happening during startup from "Cannot start extension manager:
<error>" to "An error occurred during extension manager startup: <error>"
Add the possibility of startExtensionManager returning with an error
if the Dispatcher failed to properly add the ExtensionManagerWatcher
or ExtensionManagerRunner.
Fallback to logging the startExtensionManager error message with a
severity of INFO only if extensions are required to be disabled.
Add tests for starting the extension manager with a nonexistent
socket path and a nonexistent required extension.
Issue osquery/osquery#5679
8de035ba94