Update ANTLR to 4.11.1

[Vuk Vasić (vasicvuk)]

Fixes #6558

Fixes the issue of conflict with the libraries using newer ANTLR.

The issue on ANTLR 4:
antlr/antlr4#3963

Description

• Generated ANTLR files based on 4.11.1 version.
• Changed LGFileParser.g4 to stop getting errors for EOF while generating
• Removed BOM from g4 files

[tracyboehrer (tracyboehrer)]

Vuk Vasić (@vasicvuk) There are quite a few unit test failures along the lines of:

Error Message: System.InvalidOperationException : Text 'No such template '__temp__7ada936af4354f4391f96d84e693b454'.' didn't match expected text: 'alphaEntity'
It would appear 4.11 is a breaking change in more way than one. When I free up some time, I can take a closer look. But if you switch to Release-Windows (it also reports the errors on our MacLinux pipeline) and run the unit tests locally you can see what's happening. There are several, but Microsoft.Bot.Builder.Dialogs.Adaptive.Tests will trigger the failures.

[Vuk Vasić (vasicvuk)]

Hi tracyboehrer (@tracyboehrer), Thanks for the feedback. I tried running tests but I get a lot of issues that I don't understand. In general, we use the Adaptive Expressions library and test pass for it, so I published a modified version on the local NuGet feed as a workaround.

When you have time to look at it more closely I would be happy to help and finish the PR :)

[tracyboehrer (tracyboehrer)]

Vuk Vasić (@vasicvuk) Thank you for your input on this. We used this as the starting point for another PR: #6586, and will close this one.