ci: trigger integration tests from pr comment

[piotradamczyk5]

Fixes #1349

Test Plan

How do we know the code works?

Current flows:

1. Schedule and manual trigger

• should cancel other builds in progress
• should run full integration tests on master branch
• should process results using flank scripts

2. Comment trigger

• should get pr number
• should post an issue comment
• should run full integration tests on PR branch
• should update comment based on test results

Integration tests run:

1. Integration tests build flank when the environmental variable CI is set to true
2. Integration tests do not build flank locally( when variable CI is set to false)

Comment trigger

1. Integration tests full suite is triggered by posting comment @flank-it
2. When Github action started 👀 are displayed under user comment
   
3. When Integration tests started comment is posted with a link to the integration test and timestamp (and a 🚀 )
   
4. After tests finished, comment from the previous step is replaced to result description and reaction(👍 :success, 👎 :failure)
   

Fork playground

• integration tests failed, because of missing service account

Checklist

• Add comment trigger
• Show status on PR
• Integration tests should depend on build for CI builds

[github-actions]

Timestamp: 2020-12-17 15:59:27
Buildscan url for ubuntu-workflow run 428469668
https://gradle.com/s/kyuhgran3wvvm

[codecov-io]

Codecov Report

Merging #1409 (58e522e) into master (73c9084) will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1409      +/-   ##
============================================
+ Coverage     77.32%   77.36%   +0.04%     
- Complexity      719      720       +1     
============================================
  Files           250      250              
  Lines          4834     4834              
  Branches        922      922              
============================================
+ Hits           3738     3740       +2     
+ Misses          596      595       -1     
+ Partials        500      499       -1     

[Sloox]

I think its fine.

[Sloox]

@flank-it

[piotradamczyk5]

@flank-it

Not this time @Sloox :D must be merged first
it works on Fork playground

[adamfilipow92]

• Build run befeore integration tests
• Integration tests work as expected (some test fails but it fixed here: fix: Fix integration tests on CI. #1410)
  https://github.com/piotradamczyk5/flank/runs/1571299555?check_suite_focus=true