Add enableMetaHeader to transport options (#2946)

Author: JoshMock

src/client.ts

@@ -407,7 +407,10 @@ export default class Client extends API {
       productCheck: 'Elasticsearch',
       maxResponseSize: options.maxResponseSize,
       maxCompressedResponseSize: options.maxCompressedResponseSize,
-      redaction: options.redaction
+      redaction: options.redaction,
+      /* eslint-disable-next-line @typescript-eslint/prefer-ts-expect-error */
+      // @ts-ignore enableMetaHeader will be available in transport v9.1.1
+      enableMetaHeader: options.enableMetaHeader
     }
     if (options.serverMode !== 'serverless') {
       transportOptions = Object.assign({}, transportOptions, {