Tests

Update `CommandHandler` to support batch commands #68657

Job	Run time
Test Suites - Darwin (no-ble-asan-clang)	1h 17m 1s
Test Suites - Linux (no-ble-tsan-clang)	1h 28m 35s
Test Suites - Darwin (no-ble-tsan-clang)	1h 52m 3s
REPL Tests - Linux	32m 46s
REPL Tests - Darwin	0s
	5h 10m 25s

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