Delete executor failing when calling the wrong typed fast field reader

[fmassot]

Logging error.

2022-10-15T07:11:58.673Z ERROR quickwit_actors::spawn_builder: actor-failure cause=Schema error: 'Field "view_time" is of type Date, expected I64.' exit_status=Failure(Schema error: 'Field "view_time" is of type Date, expected I64.')s::spawn_builder: actor-exit actor_id=MergeExecutor-young-L7QL exit_status=Failure(cause=Schema error: 'Field "view_time" is of type Date, expected I64.')

I reproduced it in a test and I will push a PR on this.

[fmassot]

Closed by #2116