fix: [#4544] JwtTokenExtractor.getIdentity:err! FetchError: request to https://login.botframework.com/v1/.well-known/openidconfiguration

[ceciliaavila]

Fixes #4544

Description

This PR fixes the error thrown in openIdMetadata when the bot is used behind a proxy server by setting the proxy's URL in the fetch agent.

Specific Changes

• Updated parameterizedBotFrameworkAuthentication to pass the proxy settings to jwtTokenExtractor.
• Updated jwtTokenExtractor to pass the proxy settings to openIdMetadata.
• Updated openIdMetada to set the agent in the fetch, containing the proxy URL.
• Replaced cross-fetch with node-fetch to pass the agent option.

Testing

We tested this using different tools to simulate HTTP and HTTPS proxies.
These images show the request intercepted by the proxy and the bot working.

[coveralls]

Pull Request Test Coverage Report for Build 7573729133

• 9 of 12 (75.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.03%) to 84.477%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
libraries/botframework-connector/src/auth/parameterizedBotFrameworkAuthentication.ts	0	1	0.0%
libraries/botframework-connector/src/auth/openIdMetadata.ts	7	9	77.78%

Totals
Change from base Build 7543331681:	-0.03%
Covered Lines:	20411
Relevant Lines:	22877

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💛 - Coveralls

[ceciliaavila]

Closing as a better alternative was found and documented in this comment.

[ceciliaavila]

Reopened in consideration of a new customer's scenario (link).