kie-remote: fixing serialization classloading issues in kie-remote

(cherry picked from commit ebc4a9db163e63c37f965963daeb522d3cc2598f)
kie-remote: enabling deployment-related serialization for the /execute operation

(cherry picked from commit 1262aeebe9671f9710fb1e0f91b961b489838025)
kie-remote-client: re-enabling the .execute(Command) method

(cherry picked from commit 4a71c46bacd457b5e8fb277b51667f98e23d89bb)