Update-with-Start (#2199)

## What was changed
<!-- Describe what has changed in this PR -->

Adds support for Update-with-Start, using the MultiOperation API (temporalio/api#367).

## Why?
<!-- Tell your future self why have you made these changes -->

To allow Update-with-Start feature.

Author: stephanos

docker/github/dynamicconfig/development.yaml

@@ -4,6 +4,8 @@ system.enableActivityEagerExecution:
   - value: true
 system.enableEagerWorkflowStart:
   - value: true
+frontend.enableExecuteMultiOperation:
+  - value: true
 frontend.enableUpdateWorkflowExecution:
   - value: true
 frontend.enableUpdateWorkflowExecutionAsyncAccepted:

temporal-sdk/src/main/java/io/temporal/client/BatchRequest.java

@@ -99,7 +99,7 @@ <A1, A2, A3, A4, A5> void add(
    * @param arg2 second request function parameter
    * @param arg3 third request function parameter
    * @param arg4 fourth request function parameter
-   * @param arg5 sixth request function parameter
+   * @param arg5 fifth request function parameter
    * @param arg6 sixth request function parameter
    */
   <A1, A2, A3, A4, A5, A6> void add(
@@ -171,7 +171,7 @@ <A1, A2, A3, A4> void add(
    * @param arg2 second request function parameter
    * @param arg3 third request function parameter
    * @param arg4 fourth request function parameter
-   * @param arg5 sixth request function parameter
+   * @param arg5 fifth request function parameter
    */
   <A1, A2, A3, A4, A5> void add(
       Functions.Func5<A1, A2, A3, A4, A5, ?> request, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5);
@@ -185,7 +185,7 @@ <A1, A2, A3, A4, A5> void add(
    * @param arg2 second request function parameter
    * @param arg3 third request function parameter
    * @param arg4 fourth request function parameter
-   * @param arg5 sixth request function parameter
+   * @param arg5 fifth request function parameter
    * @param arg6 sixth request function parameter
    */
   <A1, A2, A3, A4, A5, A6> void add(