Allow certain response headers coming from AzurePipelinesCredential to be logged

[ahsonkhan]

These two response headers are useful for the service team to debug and diagnose issues, and hence it is requested that we do log them.

• x-vss-e2eid
• activityid

Given our logged headers are based on an allow list, currently these two headers are REDACTED.

azure-sdk-for-python/sdk/core/azure-core/azure/core/pipeline/policies/_universal.py

Lines 399 to 426 in 0a8dfb5

	DEFAULT_HEADERS_ALLOWLIST: Set[str] = set(
	[
	"x-ms-request-id",
	"x-ms-client-request-id",
	"x-ms-return-client-request-id",
	"x-ms-error-code",
	"traceparent",
	"Accept",
	"Cache-Control",
	"Connection",
	"Content-Length",
	"Content-Type",
	"Date",
	"ETag",
	"Expires",
	"If-Match",
	"If-Modified-Since",
	"If-None-Match",
	"If-Unmodified-Since",
	"Last-Modified",
	"Pragma",
	"Request-Id",
	"Retry-After",
	"Server",
	"Transfer-Encoding",
	"User-Agent",
	"WWW-Authenticate", # OAuth Challenge header.
	]