[aptos-cli] Use current directory for workspace .aptos if it doesn't exist

[gregnazario]

Test Plan

cargo run -p aptos -- node run-local-testnet --with-faucet
warning: patch for `diesel` uses the features mechanism. default-features and features will not take effect because the patch dependency does not support this mechanism
   Compiling aptos v0.2.4 (/opt/git/aptos-core/crates/aptos)
    Finished dev [unoptimized + debuginfo] target(s) in 26.22s
     Running `target/debug/aptos node run-local-testnet --with-faucet`
Building genesis with 1 validators. Directory of output: "/opt/git/aptos-core/.aptos/testnet"
Completed generating configuration:
        Log file: "/opt/git/aptos-core/.aptos/testnet/validator.log"
        Test dir: "/opt/git/aptos-core/.aptos/testnet"
        Aptos root key path: "/opt/git/aptos-core/.aptos/testnet/mint.key"
        Waypoint: 0:baf2610e2c80c28204b22f116f15341a952b82cdd2556b685c772b4867bf2c38
        ChainId: TESTING
        REST API endpoint: 0.0.0.0:8080
        FullNode network: /ip4/0.0.0.0/tcp/6181

Aptos is running, press ctrl-c to exit

Faucet is running.  Faucet endpoint: 0.0.0.0:8081
^C
(venv)  ✘ greg@jiggy  /opt/git/aptos-core   fix-cli-path  rm .aptos 
rm: .aptos: is a directory
(venv)  ✘ greg@jiggy  /opt/git/aptos-core   fix-cli-path  rm -r .aptos
(venv)  greg@jiggy  /opt/git/aptos-core   fix-cli-path  cargo run -p aptos -- node run-local-testnet --with-faucet
warning: patch for `diesel` uses the features mechanism. default-features and features will not take effect because the patch dependency does not support this mechanism
    Finished dev [unoptimized + debuginfo] target(s) in 0.76s
     Running `target/debug/aptos node run-local-testnet --with-faucet`
Building genesis with 1 validators. Directory of output: "/opt/git/aptos-core/.aptos/testnet"
Completed generating configuration:
        Log file: "/opt/git/aptos-core/.aptos/testnet/validator.log"
        Test dir: "/opt/git/aptos-core/.aptos/testnet"
        Aptos root key path: "/opt/git/aptos-core/.aptos/testnet/mint.key"
        Waypoint: 0:1cb4fd88e241a53038f5cbd25fa1a08a386e11eea965ba0093f0852e86888fdb
        ChainId: TESTING
        REST API endpoint: 0.0.0.0:8080
        FullNode network: /ip4/0.0.0.0/tcp/6181

Aptos is running, press ctrl-c to exit

^C
(venv)  ✘ greg@jiggy  /opt/git/aptos-core   fix-cli-path  ls .aptos 
testnet

---

This change is 

[wrwg]

I guess there are some baselines you have to fix...