feat(core): Deprecate Transaction.instrumenter (#10162)

Author: Lms24

packages/types/src/transaction.ts

@@ -99,6 +99,8 @@ export interface Transaction extends TransactionContext, Omit<Span, 'setName' |
 
   /**
    * The instrumenter that created this transaction.
+   *
+   * @deprecated This field will be removed in v8.
    */
   instrumenter: Instrumenter;