Delayed delivery does not work when using SqlServerDelayedMessageStore without EnableInstallers

Describe the bug

Description

For some reason, the SqlServerDelayedMessageStore copies the SQL commands from SqlConstants into internal variables but only in the Initialize method on line 111..115.

Unfortunately this Initialize method is only called when EnableInstallers has been set. Not setting EnableInstallers does not copy those commands and the entire DelayedMessages in MSQM is not working and throws continuous errors that the CommandText has not been set.

Expected behavior

That it's working?

Actual behavior

When EnableInstallers has not been set:
- Continuous errors when trying to fetch timeout messages
- Delayed messages and timeouts do not work

Versions

Please list the version of the relevant packages or applications in which the bug exists.

2.0.0 - 2.0.3

Steps to reproduce

Set up DelayedDeliver on MSMQ
Do not execute EnableInstallers()

Relevant log output

NServiceBus.Transport.Msmq.DelayedDelivery.DueDelayedMessagePoller[0]
      Failure during timeout polling.
      System.InvalidOperationException: BeginExecuteReader: CommandText property has not been initialized
         at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
         at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
         at System.Data.SqlClient.SqlCommand.BeginExecuteReaderInternal(CommandBehavior behavior, AsyncCallback callback, Object stateObject, Int32 timeout, Boolean inRetry, Boolean asyncWrite)
         at System.Data.SqlClient.SqlCommand.BeginExecuteReaderAsync(CommandBehavior behavior, AsyncCallback callback, Object stateObject)
         at System.Threading.Tasks.TaskFactory`1.FromAsyncImpl[TArg1](Func`4 beginMethod, Func`2 endFunction, Action`1 endAction, TArg1 arg1, Object state, TaskCreationOptions creationOptions)
         at System.Threading.Tasks.TaskFactory`1.FromAsync[TArg1](Func`4 beginMethod, Func`2 endMethod, TArg1 arg1, Object state)
         at System.Data.SqlClient.SqlCommand.ExecuteReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken)
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at NServiceBus.SqlServerDelayedMessageStore.<FetchNextDueTimeout>d__15.MoveNext() in /_/src/NServiceBus.Transport.Msmq/DelayedDelivery/Sql/SqlServerDelayedMessageStore.cs:line 140
      --- End of stack trace from previous location where exception was thrown ---
         at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
         at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
         at NServiceBus.Transport.Msmq.DelayedDelivery.DueDelayedMessagePoller.<Poll>d__8.MoveNext() in /_/src/NServiceBus.Transport.Msmq/DelayedDelivery/DueDelayedMessagePoller.cs:line 193

Particular / NServiceBus.Transport.Msmq