[cicd] tweak config
[cicd] tweak config

* moving xlarge to 2xlarge for smoke and unit (trial with circleci)
* removing jsonrpc integration tests
* moving docker builds to medium docker container

Closes: #129

aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core