[Facebook Adapters] Add Facebook functional test

[matiasroldan6]

NOTE: YAML file to set up a pipeline with this functional test in PR #3262

Description

This pull request adds a functional test for the Facebook Adapter.

Changes made

We added the class FacebookChatTests.cs with the functional test for Facebook.
Also we edited the templates template-with-new-rg.json and template-with-preexisting-rg.json from the PrimaryTestBot to include the required variables to deploy it to Azure.

Testing

[coveralls]

Pull Request Test Coverage Report for Build 99471

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1904 unchanged lines in 265 files lost coverage.
• Overall coverage remained the same at 78.087%

---

Files with Coverage Reduction	New Missed Lines	%
/libraries/Adapters/Microsoft.Bot.Builder.Adapters.Facebook/FacebookAdapterOptions.cs	1	86.67%
/libraries/integration/Microsoft.Bot.Builder.Integration.ApplicationInsights.Core/ApplicationBuilderExtensions.cs	1	71.43%
/libraries/Microsoft.Bot.Builder.AI.LUIS/LuisApplication.cs	1	96.36%
/libraries/Microsoft.Bot.Builder.AI.LUIS/V3/LuisApplication.cs	1	96.43%
/libraries/Microsoft.Bot.Builder.AI.LUIS/V3/LuisUtil.cs	1	96.35%
/libraries/Microsoft.Bot.Builder/BotStateSet.cs	1	85.0%
/libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/Actions/BaseInvokeDialog.cs	1	90.0%
/libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/Actions/Case.cs	1	87.5%
/libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/ActionState.cs	1	50.0%
/libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/EntityEvents.cs	1	75.0%

Totals
Change from base Build 99442:	0.0%
Covered Lines:	20896
Relevant Lines:	26760

---

💛 - Coveralls

[fuselabs]

✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.AI.Luis.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.AI.QnA.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.ApplicationInsights.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Azure.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Dialogs.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Integration.ApplicationInsights.Core.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Integration.AspNet.Core.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.TemplateManager.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.Testing.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Configuration.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Connector.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Schema.dll compared against version 4.6.3
✔️ No Binary Compatibility issues for Microsoft.Bot.Streaming.dll compared against version 4.6.3

[BruceHaley]

Looks OK