feat(explore): add span.system as searchable field (#93611)

add span category and span system as searchable fields in explore.
Makes it so when we link from insights to explore, these fields aren't
red

Author: DominikB2014

static/app/views/explore/constants.tsx

@@ -55,6 +55,8 @@ export const SENTRY_SPAN_STRING_TAGS: string[] = [
   SpanIndexedField.NORMALIZED_DESCRIPTION,
   SpanIndexedField.RELEASE, // temporary as orgs with >1k keys still want releases
   SpanFields.PROJECT_ID,
+  SpanFields.SPAN_SYSTEM,
+  SpanFields.SPAN_CATEGORY,
 ];
 
 export const SENTRY_SPAN_NUMBER_TAGS: string[] = [...SENTRY_SEARCHABLE_SPAN_NUMBER_TAGS];

static/app/views/insights/types.tsx

@@ -93,6 +93,8 @@ export enum SpanFields {
   PROJECT_ID = 'project.id',
   RESPONSE_CODE = 'span.status_code',
   DEVICE_CLASS = 'device.class',
+  SPAN_SYSTEM = 'span.system',
+  SPAN_CATEGORY = 'span.category',
 }
 
 type WebVitalsMeasurements =