[Identity] Make pipeline policy configurable via kwargs

[jiasli]

In track 2 SDKs, logging_policy and http_logging_policy are configurable via kwargs passed to SubscriptionClientConfiguration.__init__:

azure-sdk-for-python/sdk/resources/azure-mgmt-resource/azure/mgmt/resource/subscriptions/v2019_11_01/_configuration.py

Lines 57 to 58 in 27e4203

	self.logging_policy = kwargs.get('logging_policy') or policies.NetworkTraceLoggingPolicy(**kwargs)
	self.http_logging_policy = kwargs.get('http_logging_policy') or ARMHttpLoggingPolicy(**kwargs)

Azure Identity hard-codes HttpLoggingPolicy while creating policies, making it impossible to replace HttpLoggingPolicy with SansIOHTTPPolicy without overriding the whole policies. (I have to override the whole policies in order to replace HttpLoggingPolicy with SansIOHTTPPolicy.)

azure-sdk-for-python/sdk/identity/azure-identity/azure/identity/_internal/msal_client.py

Lines 124 to 132 in fdf11b3

	policies = [
	ContentDecodePolicy(),
	config.user_agent_policy,
	config.proxy_policy,
	config.retry_policy,
	config.logging_policy,
	DistributedTracingPolicy(**kwargs),
	HttpLoggingPolicy(**kwargs),
	]

Azure Identity should follow the same pattern and make individual policies configurable, especially for http_logging_policy which is required for Azure CLI to disable logs from HttpLoggingPolicy, as it is a redacted/duplicated version of NetworkTraceLoggingPolicy.

More detail

• Email: Need an option to disable http_logging_policy (ARMHttpLoggingPolicy)
• PR: {Core} Refactor client factory for Track 2 SDK azure-cli#15791

[chlowell]

Closing this because I believe you no longer require it, please reopen if I'm mistaken.