scripts: Support custom arguments to the test binary with dev_cli.sh

The dev container interface script (e.g. 'dev_cli.sh') now supports the
following arguments syntax for running tests:

`tests [--unit|--cargo|--all] [--libc musl|gnu] [-- [<test scripts args>] [-- [<test binary args>]]] `

In this way, we can pass custom arguments to the test binary (either
"cargo test" or "performance-metrics") with our dev container script.
For example:

`$ ./dev_cli.sh tests --metrics -- -- --report-file /tmp/metrics.json --test-filter latency`
`$ ./dev_cli.sh tests --integration -- --test-filter "test_serial"  -- --nocapture --test-threads=1`

Fixes: #3739

Signed-off-by: Bo Chen <chen.bo@intel.com>

scripts/run_integration_tests_live_migration.sh

@@ -87,7 +87,7 @@ echo 6144 | sudo tee /proc/sys/vm/nr_hugepages
 sudo chmod a+rwX /dev/hugepages
 
 export RUST_BACKTRACE=1
-time cargo test $features "live_migration::$test_filter" -- --test-threads=1
+time cargo test $features "live_migration::$test_filter" -- --test-threads=1 ${test_binary_args[*]}
 RES=$?
 
 exit $RES