Add quick link to support in issue creation form

[ivoanjo]

What does this PR do?

This PR adds a quick link to talk to Datadog support as part of the issue creation flow. Of course, folks still can (and are very much encouraged to) file tickets as needed, but often support will be faster and can delve into account specifics to provide better help.

I borrowed this idea from https://github.com/DataDog/test-template/issues/new/choose and you can see it working live in there.

Motivation:

Improve support experience for Ruby users.

Additional Notes:

I've also added some cool emoji to the existing issue types.

How to test the change?

Other than looking at the template repo, I'm not sure if there's a way to see these changes live before we merge them.

But, on the other hand, it's very easy to check and revert, so the risk is very low.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.90%. Comparing base (0669dbb) to head (0214400). Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3754   +/-   ##
=======================================
  Coverage   97.90%   97.90%           
=======================================
  Files        1237     1237           
  Lines       74200    74200           
  Branches     3598     3598           
=======================================
+ Hits        72643    72645    +2     
+ Misses       1557     1555    -2     

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[ivoanjo]

It's live: