Add sendx5c parameter to Certificate factory class

[ceciliaavila]

#minor

Description

This PR adds the sendx5c parameter to the CertificateServiceClientCredentialsFactory and MsalAppCredentials classes.

Specific Changes

• Added sendx5c parameter to the CertificateServiceClientCredentialsFactory class into a new constructor.
• Added sendx5c parameter to the MsalAppCredentials class into a new constructor.
• Updated CertificateServiceClientCredentialsFactoryTests to cover the new constructor.
• Added MsalServiceClientCredentialsFactoryTests test class.

Testing

This image shows the new tests passing.

[ceciliaavila]

Converting to draft while reviewing #6694

[coveralls]

Pull Request Test Coverage Report for Build 372341

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 48 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.06%) to 73.511%

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Files with Coverage Reduction	New Missed Lines	%
/libraries/AdaptiveExpressions/BuiltinFunctions/GetNextViableTime.cs	1	90.91%
/libraries/AdaptiveExpressions/BuiltinFunctions/GetPreviousViableTime.cs	1	90.91%
/libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/ServiceCollectionExtensions.cs	1	93.55%
/libraries/Microsoft.Bot.Connector/Authentication/MsalAppCredentials.cs	45	12.22%

Totals
Change from base Build 371560:	0.06%
Covered Lines:	24174
Relevant Lines:	32885

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💛 - Coveralls

[BruceHaley]

✔️ No Binary Compatibility issues for Microsoft.Bot.Connector.dll

[ceciliaavila]

Hi @tracyboehrer , we reverted the changes to CertificateServiceClientCredentialsFactory as they were addressed in #6694. We kept the changes to MsalAppCredentials and the new unit tests.