protobuf: update pertinent sites to anyConvertAndValidate

[junr03]

Description:
There are several places that use anyConvert and then validate the typed message. #9516 introduced anyConvertAndValidate. Update call pertinent callsites to the new function.

[stale]

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[junr03]

@mattklein123 did you mean to re-open this?

[mattklein123]

Sorry I didn't realize it is done.