Check if all relevant options can be set via `sentry.properties`

[adinauer]

Description

We found some options (send-default-pii and max-request-body-size) that weren't parsed from external options (sentry.properties) and thus couldn't be configured for our Sentry OpenTelemetry Java Agent when using auto init.

We should investigate whether there's more options that should be configurable through sentry.properties but currently aren't.