feat(core): Don't gate user on logs with sendDefaultPii

[AbhiPrasad]

ref getsentry/sentry-docs#13974

[mdtro]

@AbhiPrasad Does this mean we will by default send the user's name, email, and ID? Or does it just mean that developers can use the setUser functionality without sendDefaultPII set to true?

[AbhiPrasad]

If the SDK automatically collects user information (and thus calls Sentry.setUser for a user), we should gate this behind sendDefaultPii.

If a user explicitly calls Sentry.setUser, thats not default PII, that's the user opting in explicitly to the behaviour, so we should attach user information to all outgoing events as appropriate.

In this change we just remove sendDefaultPii gating user scope info (from Sentry.setUser) being applied to logs. We do not change behaviour about setting user automatically for users. Essentially we assume if the user info is already on the scope, the user wants to also see it in their events.