Remove double executor run from RetryingClient.space

[ArtDu]

Now we have a performance problem so we run retrying wrapper in the executor and the retryable task in the executor

cartridge-java/src/main/java/io/tarantool/driver/core/RetryingTarantoolClient.java

Line 444 in d9ca853

return wrapOperation(() -> CompletableFuture.supplyAsync(spaceSupplier, executor)).get();