port: Fix: add cache for luis recognizer result to avoid extra requests

[cosmicshuai]

closes: #3806
In order to avoid two LUIS network calls from the child dialog for the same user query when interruptions are enabled.
In this PR, Luis Recognizer would cache the luis result for each turn, using endpoint combines with application id as the key.

[cosmicshuai]

@joshgummersall
Hi Josh, as Steve mentioned, the LuisRecognizer already has the cache. In order to port the test, I've changed a lot code in testScript and LuisAdaptiveRecognizer. I am wondering whether it is worth to do that? Or is there a better way to write this test?

[joshgummersall]

Nice work! Is this "Ready for Review" aka ready to merge?

[coveralls]

Pull Request Test Coverage Report for Build 994516615

• 24 of 26 (92.31%) changed or added relevant lines in 6 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.06%) to 84.364%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
libraries/botbuilder-dialogs-adaptive-testing/src/testActions/assertTelemetryContains.ts	13	15	86.67%

Totals
Change from base Build 994516144:	0.06%
Covered Lines:	19659
Relevant Lines:	22112

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💛 - Coveralls