[ota-requestor-app] Establish connection to OTA Provider (after commissioning)

[holbrookt]

Problem

Reference app ota-requestor-app needs to open a secure session to an OTA Provider in order to send QueryImage command and begin the OTA process.

Dependent on #7976 being completed first.

Proposed Solution

Use the solution from #7976 to open a connection to the first Node ID in DefaultOTAProviders attribute, or any Node ID that was sent in an AnnounceOTAProvider command. If not commissioned yet, wait at least 1 minute after commissioning to open the connection.

Additionally, when moving away from the Controller API, we should also be able to remove the PersistentStorage.cpp and PersistentStorage.h files from ota-requestor-app/linux.