Store instrumentation scope

[guilload]

Description

This scope contains the collector name and version.

How was this PR tested?

Deleted trace index and ran:

QW_ENABLE_JAEGER_SERVICE=true \
QW_ENABLE_OPENTELEMETRY_OTLP_EXPORTER=true \
QW_ENABLE_OPENTELEMETRY_OTLP_SERVICE=true \
OTEL_EXPORTER_OTLP_ENDPOINT=http://127.0.0.1:7281 \
RUST_BACKTRACE=1 \
RUST_LOG=info,quickwit=info,quickwit_jaeger=debug \
cargo run --manifest-path quickwit/Cargo.toml --all-features -- run

I also checked that the field was correctly populated in the UI. Once the data model and logic are stable, I will add some unit tests.