Removed redundant timeout handling for executeCommand

Removed redundant timeout handling for executeCommand

executeCommand was called from a GlobalScope.async coroutine to handle executeCommand timeout.
Execution timeout is already handled on the gRPC side, there's no need to handle this timeout by wrapping the gRPC call with a coroutine timeout.
When a lot of long running processes in executeCommand were running, it was causing process to queue on BP side to get their executeCommand executed because all the capacity of couroutines were being used by some long running process.
This was causing a delay on the execution of prepareEnv and executeCommand and would even some time make those process timeout because of component timeout.

Issue-ID: CCSDK-3386
Signed-off-by: Julien Fontaine <julien.fontaine@bell.ca>
Change-Id: If3aef4b6b65006e874525436bf3f6d1b1a3d8c9a