DepthAI Demo v3.0.1 - device switching and callback fixes

[VanDavv]

In this release, our demo got a bunch of bug fixes for issues we discovered after the initial 3.0.0 release

• Fixed switching between OAK-1 and OAK-D devices
• Fixed config object passing between threads
• Fixed callbacks, so that using custom callback file works again
• Removed encoders from rectifiedLeft and rectifiedRight streams to prevent OOM issue on OAK-D-PoE

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This discussion was created from the release DepthAI Demo v3.0.1 - device switching and callback fixes.