Making parameter modifications on global Defaults drivers is ignored by the driver client.

[vachillo]

• I have read and agree to the contributing guidelines.

Describe the bug
Any parameters set after init any drivers that use a client are ignored because the client is initialized during driver initialization

To Reproduce

Defaults.drivers_config = AzureOpenAiDriversConfig(
    azure_ad_token_provider=get_token,
    azure_endpoint=os.environ["AZURE_OPENAI_DEFAULT_ENDPOINT"],
)

Defaults.drivers_config.text_to_speech_driver.azure_endpoint = os.environ[
    "AZURE_OPENAI_OTHER_ENDPOINT"
]

the above fails at runtime because the client used for the AzureOpenAiTextToSpeechDriver does not have the updated endpoint set on the global config.

Expected behavior
The above config should set the correct endpoint for the client on the driver

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 0.5.1]

Additional context
Add any other context about the problem here.

[collindutter]

@vachillo was this fixed with #1173?