fix: [#4449] CloudAdapter always builds Connector with MicrosoftAppCredentials (never CertificateAppCredentials) -- certificate auth flow broken

[sw-joelmut]

Fixes #4449

Description

This PR adds support for the CloudAdapter's configuration process to authenticate using certificates is MultiTenant and SingleTenant apps.

Specific Changes

• Added CertificateServiceClientCredentialsFactory class, to instantiate and configure the CertificateAppCredentials class, so the process knows how to authenticate with certificates.
• Added ConfigurationServiceClientCredentialFactory unit tests, validating the different code paths when using certificates.
• Added CertificateThumbprint and CertificatePrivateKey constants to the AuthenticationConstants, ConfigurationBotFrameworkAuthentication and ConfigurationServiceClientCredentialFactory classes.
• Updated ConfigurationServiceClientCredentialFactory to detect when a certificate is provided, and execute the proper functionality to authenticate with certificates (instead of a password) in MultiTenant and SingleTenant apps.

Testing

The following images show the bot and unit tests working as expected.

[coveralls]

Pull Request Test Coverage Report for Build 4767518035

• 30 of 31 (96.77%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 84.672%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
libraries/botframework-connector/src/auth/certificateServiceClientCredentialsFactory.ts	15	16	93.75%

Totals
Change from base Build 4198805038:	0.02%
Covered Lines:	20041
Relevant Lines:	22432

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💛 - Coveralls

[jineshjin]

@sw-joelmut when can we expect this to be reviewed, merged and released?

[sw-joelmut]

Hi @jineshjin, I don't know when it will be released, maybe @tracyboehrer can help us with that.

[jineshjin]

Hi @tracyboehrer, just wanted to know, when are we planning to merge and release this?