[BEAM-12460] Provide a simpler interface to convert Beam Row to GenericRecord

[anantdamle]

Provide a simpler interface to convert Beam Row to GenericRecord when inferring from Beam schema .
@iemejia can you help review

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ValidatesRunner compliance status (on master branch)

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Examples testing status on various runners

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[iemejia]

LGTM

[anantdamle]

@iemejia thanks for the approval, can you merge the PR?

[iemejia]

Oh i forgot oups sorry will do.