[otel-arrow-rust] Instrumentation Scope name is not correctly decoded

[albertlockett]

I noticed this when doing some testing.

If we change InstrumentationScope::default() here to InstrumentationScope::new("test")

otel-arrow/rust/otel-arrow-rust/src/validation/testdata.rs

Line 71 in 4c41eea

ScopeMetrics::build(InstrumentationScope::default())

Then this test will fail:

otel-arrow/rust/otel-arrow-rust/src/validation/otlp.rs

Lines 294 to 299 in 4c41eea

	async fn test_otap_metrics_single_request() {
	run_single_round_trip_test::<OTLPMetricsInputType, OTAPMetricsOutputType, _>(
	testdata::metrics::create_single_request,
	None,
	)
	.await;

I think it probably shouldn't fail & that we probably have a bug somewhere handling instrumentation scope name

[albertlockett]

This isn't specific to metrics .. It's the same story with logs