feat(v8/serverless): Use subpath exports package

[AbhiPrasad]

This is a direct follow up to #10540, where I refactored the serverless package to use subpath exports.

// before
import * as Sentry from '@sentry/serverless';

Sentry.AWSLambda.init(...);

// after
import * as Sentry from '@sentry/serverless/aws';

Sentry.init(...);

// before
import * as Sentry from '@sentry/serverless';

Sentry.GCPFunction.init(...);

// after
import * as Sentry from '@sentry/serverless/gcp';

Sentry.init(...);

Does this API feel reasonable to you? Should we go a step further and just publish separate packages?

[AbhiPrasad]

in the future this will be *.mjs fwiw

[AbhiPrasad]

I will add another e2e test to validate the subpath exports if we are fine with this approach.

[mydea]

I don't have a strong opinion, but I think I tend to say let's maybe just make these dedicated packages. As logically otherwise e.g. react/vue/svelte could also just be subpath exports from browser 🤔 But maybe serverless is also simply "less important" and it's good enough this way - not sure.

[lforst]

I am with Francesco on this one. No hard opinions but dedicated packages would make a bit more sense to me.