Refactor `TextToSpeechDriver`s #4960

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Run time

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Job	Run time
test-bare (3.9)	1m 15s
test-windows (3.9)	9m 20s
test-ubuntu (3.9)	9m 51s
test-ubuntu (3.10)	9m 56s
test-ubuntu (3.11)	3m 22s
test-ubuntu (3.12)	3m 55s
	37m 39s