feat: add support for change streams transaction exclusion option for Batch Write (#2070)

* feat: change stream transaction exclusion option for Batch Write

* refactor

Author: alkatrivedi

src/database.ts

@@ -3289,6 +3289,7 @@ class Database extends common.GrpcServiceObject {
           session: session!.formattedName_!,
           mutationGroups: mutationGroups.map(mg => mg.proto()),
           requestOptions: options?.requestOptions,
+          excludeTxnFromChangeStream: options?.excludeTxnFromChangeStreams,
         }
       );
       let dataReceived = false;

src/transaction.ts

@@ -62,6 +62,7 @@ export interface TimestampBounds {
 export interface BatchWriteOptions {
   requestOptions?: Pick<IRequestOptions, 'priority' | 'transactionTag'>;
   gaxOptions?: CallOptions;
+  excludeTxnFromChangeStreams?: boolean;
 }
 
 export interface RequestOptions {

test/database.ts

@@ -600,6 +600,7 @@ describe('Database', () => {
       requestOptions: {
         transactionTag: 'batch-write-tag',
       },
+      excludeTxnFromChangeStream: true,
       gaxOptions: {autoPaginate: false},
     } as BatchWriteOptions;
 
@@ -644,6 +645,7 @@ describe('Database', () => {
           session: fakeSession!.formattedName_!,
           mutationGroups: mutationGroups.map(mg => mg.proto()),
           requestOptions: options?.requestOptions,
+          excludeTxnFromChangeStream: options?.excludeTxnFromChangeStreams,
         }
       );