token-cli: Use libtest-mimic to parallelize tests (#5821)

* token-cli: Use libtest-mimic to reuse test validator

* Fixup tests

* rename async_test -> async_trial

Author: joncinque

Cargo.lock

@@ -49,9 +49,15 @@ tokio = "1.34"
 [dev-dependencies]
 solana-test-validator = "=1.17.2"
 assert_cmd = "2.0.12"
+libtest-mimic = "0.6"
 serial_test = "2.0.0"
 tempfile = "3.8.1"
 
 [[bin]]
 name = "spl-token"
 path = "src/main.rs"
+
+[[test]]
+name = "command"
+path = "tests/command.rs"
+harness = false