[PORT] re-do multiLingualLg

[Danieladu]

ref: microsoft/botbuilder-dotnet#3551
close: #2084

• add a defaultLanguages param format list which can replace "" as default
• sync with latest SDK how language policy is updated, "de-de" => "de-de", "de"
• replace EvaluateText with Evaluate
• support passed in parsed Templates instead of just file paths, Dict<string, Templates>

[coveralls]

Pull Request Test Coverage Report for Build 123023

• 1 of 26 (3.85%) changed or added relevant lines in 1 file are covered.
• 10 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.1%) to 77.499%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
libraries/botbuilder-lg/src/multiLanguageLG.ts	1	26	3.85%

Files with Coverage Reduction	New Missed Lines	%
libraries/botbuilder-lg/src/multiLanguageLG.ts	1	2.74%
libraries/botframework-streaming/src/webSocket/webSocketTransport.ts	2	80.65%
libraries/botframework-streaming/src/webSocket/webSocketServer.ts	7	66.67%

Totals
Change from base Build 122999:	-0.1%
Covered Lines:	11934
Relevant Lines:	14675

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💛 - Coveralls