feat(replays): Set platform as empty string if platform is not provided

[cmanallen]

Previously it was set to javascript as that was the only platform replay was available on. With the addition of mobile replays this is no longer true. The query in sentry already uses the anyIf operator and filters out empty values.

Related: getsentry/sentry#74074

[michellewzhang]

does this mean that if someone were to refresh the page on a mobile replay (referencing the video @romtsn sent), the platform in the tags panel might sometimes disappear (instead of changing to javascript)?

[cmanallen]

@michellewzhang No if a non-empty value is set it will always be returned. There should only be one non-empty value. If there are two (in the case @romtsn identified) then one of the non-empty values will be chosen at "random".

[michellewzhang]

@michellewzhang No if a non-empty value is set it will always be returned. There should only be one non-empty value. If there are two (in the case @romtsn identified) then one of the non-empty values will be chosen at "random".

makes sense!

[ayirr7]

Might also be a good idea to update any schema examples in the sentry-kafka-schemas repo if needed.

[cmanallen]

@ayirr7 All good. Platform is not provided on any of the affected events.