Add: y210le support in ffmpeg plugin

[skolelis]

Add support for Y210LE format in FFmpeg plugin on both RX and TX sides.

• Implemented conversion using st_convert_api to convert Y210LE format to yuv422p10le for transport.

This is not the usual way of using MTL API it's done to support Intel Tiber and the non-standard way
of conversion in qsv Tiber pipelines.

[skolelis]

PR created basing on the patch in BCS. However after discussion with @DawidWesierski4 , better shorter smoother solution can be eventually created instead of these changes. So, hold on before merging to main!

[DawidWesierski4]

@skolelis I thought we can save on the conversion, this format seems to be 16 bit and we have internal conversion devices
BUT I WAS WRONG

I checked it and it seems to be the easiest way of doing this
Im fine with the format just please correct linting errors

Fix the commit message to something sensible (without link) and i will give my approve ok ?

[skolelis]

LGTM

[Sakoram]

When initializing st20p session with ops_rx.transport_fmt != ops_rx.output_fmt it means that frames should be converted automatically by the session.
Could someone tell me why here the conversion is done "manually" by the ffmpeg plugin? Options:

1. I'm wrong and this in not a feature of the pipeline mode. -> everything's fine, approve.
2. I'm right -> please use this feature and remove invoking conversion from the plugin.

[DawidWesierski4]

When initializing st20p session with ops_rx.transport_fmt != ops_rx.output_fmt it means that frames should be converted automatically by the session. Could someone tell me why here the conversion is done "manually" by the ffmpeg plugin? Options:

1. I'm wrong and this in not a feature of the pipeline mode. -> everything's fine, approve.
2. I'm right -> please use this feature and remove invoking conversion from the plugin.

well i tested it a lil bit,
This was my assumption too buuuuuuuuut it didn't work oob
Mby its better to investigate it further

[DawidWesierski4]

Please add in FFMPEG Readme an explicit statement that y210 is a format that is not supported by the ffmpeg plugins for mtl