Align `Span` interface with changes in Otel Span interface

[mydea]

There are three methods in the OTEL Span interface that we do not have in our own, leading to technical incompatibility - see https://github.com/open-telemetry/opentelemetry-js/blob/main/api/src/trace/span.ts

• addLink - should noop in SentrySpan
• addLinks - should noop in SentrySpan
• recordException - should probably capture an exception??

Without this, you technically can't pass something typed as Span from @sentry/types into some API that expects an OTEL span.