Improve POTel span/description/status logic

[sl0thentr0py]

@sentrivana moved op/description/status logic to utils, but status mapping will be done separately. Maybe @szokeasaurusrex can look into making this logic as similar to JS as possible, but for now this is good enough for this PR.

https://github.com/getsentry/sentry-javascript/blob/master/packages/opentelemetry/src/utils/mapStatus.ts
https://github.com/getsentry/sentry-javascript/blob/master/packages/opentelemetry/src/utils/parseSpanDescription.ts

Originally posted by @sl0thentr0py in #3223 (comment)