ref(spans): Remove span kind from field extraction in consumer (#103209)

The field is no longer part of the Schema, Relay extracts it to an
attribute already for Transaction and OTLP Spans.

Relay: getsentry/relay#5368
Schema: getsentry/sentry-kafka-schemas#457

No more usages of Span Kind:
```
┌─── [🐍.venv] src/sentry/spans <dav1d/rm-span-kind> 
└─ % rg kind
buffer.py
58:    * span-buf:z:* -- the actual set keys, containing span payloads. Each key contains all data for a segment. The most memory-intensive kind of key.

consumers/process_segments/enrichment.py
216:    Check the measurements on the span to determine what kind of start type the
```

Closes: INGEST-631

Author: Dav1dde

pyproject.toml

@@ -81,7 +81,7 @@ dependencies = [
     # [end] jsonschema format validators
     "sentry-arroyo>=2.33.1",
     "sentry-forked-email-reply-parser>=0.5.12.post1",
-    "sentry-kafka-schemas>=2.1.13",
+    "sentry-kafka-schemas>=2.1.15",
     "sentry-ophio>=1.1.3",
     "sentry-protos>=0.4.2",
     "sentry-redis-tools>=0.5.0",

src/sentry/spans/consumers/process_segments/convert.py

@@ -15,7 +15,6 @@
     "end_timestamp": "sentry.end_timestamp_precise",
     "event_id": "sentry.event_id",
     "hash": "sentry.hash",
-    "kind": "sentry.kind",
     "name": "sentry.name",
     "parent_span_id": "sentry.parent_span_id",
     "received": "sentry.received",