Hybrid SDKs should set the `sentryClientName` on Native SDKs during SDK init.

[marandaneto]

The reason is that sentryClientName is logged out by Relay when there are errors.

For Hybrid SDKs, this is going to be always the Native SDKs because they are the ones sending the event over the wire.
Ideally, the Hybrid SDKs overwrite this value so when there's errors, it's logged out as the Hybrid SDK itself instead of eg Android or iOS.
The other benefit is that we can collect event metrics per SDK (Native events on an RN app will be counted as RN and not Native anymore).

Another option is that Relay logs the event.sdk instead of the USER_AGENT or sentry_client from the authHeader.

Android already has the SentryOptions#setSentryClientName, iOS to be confirmed, likely needs to be exposed in the PrivateSentrySDKOnly class, @brustolin can you confirm?

### Tasks
- [ ] https://github.com/getsentry/sentry-dart/issues/1185
- [ ] https://github.com/getsentry/sentry-react-native/issues/2813
- [ ] https://github.com/getsentry/sentry-dart/issues/1333
- [ ] https://github.com/getsentry/sentry-react-native/issues/2960
- [ ] https://github.com/getsentry/sentry-java/issues/2678
- [ ] https://github.com/getsentry/sentry-dotnet/pull/2389
- [ ] https://github.com/getsentry/sentry-dotnet/pull/2171
- [ ] https://github.com/getsentry/sentry-capacitor/issues/379

[brustolin]

iOS already have this option exposed in the `PrivateSentrySDKOnly' class.

+ (void)setSdkName:(NSString *)sdkName andVersionString:(NSString *)versionString;

[marandaneto]

iOS already have this option exposed in the `PrivateSentrySDKOnly' class.

+ (void)setSdkName:(NSString *)sdkName andVersionString:(NSString *)versionString;

Are you sure this field is being used for the HTTP request metadata and not only for the sdk.event?
iOS uses SentryMeta, if setSdkName overwrites the SentryMeta field, then we don't need to change anything on iOS.

[brustolin]

Yes!

[marandaneto]

Consider the fact that this makes sense if the events are captured in the Hybrid SDKs, but if the Native SDK is capturing the events themselves, they should still keep the original sentryClientName.

[marandaneto]

We should set the sentry_client in the authHeader.
https://develop.sentry.dev/sdk/overview/#authentication

[brustolin]

@marandaneto, isn't this what we are doing here:

https://github.com/getsentry/sentry-cocoa/blob/8.0.0/Sources/Sentry/SentryNSURLRequest.m#L107-L110

Maybe I didn't get your last comment.

[marandaneto]

@marandaneto, isn't this what we are doing here:

getsentry/sentry-cocoa@8.0.0/Sources/Sentry/SentryNSURLRequest.m#L107-L110

Maybe I didn't get your last comment.

It is, but the Hybrid SDKs don't overwrite this value yet.