Add display name for attributes #173

For some attributes we want to have a different "display name" that the UI should relay on, rather than using the original name we use in the ingestion and storage layer.
See https://github.com/getsentry/sentry/blob/2ff7ab42eded84c7e6209054b45d4e02bd22956a/src/sentry/search/eap/spans/attributes.py#L99-L103 and slack thread https://sentry.slack.com/archives/C06KVE7V0DA/p1760630210087289
See https://github.com/getsentry/sentry/blob/2ff7ab42eded84c7e6209054b45d4e02bd22956a/src/sentry/search/eap/spans/attributes.py#L99-L103 and slack thread https://sentry.slack.com/archives/C06KVE7V0DA/p1760630210087289