Slack notification with the total build time

[v1v]

What does this PR do?

Add build time

Why is it important?

It might help to easily identify what builds are flaky because the CI enviornmental issues with the provisioner.

Test

From the UTs

*Build*: `folder/mbp/master` <http://jenkins.example.com:8080/blue/organizations/jenkins/folder%2Fmbp/detail/master/1/pipeline|#49> for branch `develop` got the status `ABORTED`. (Took `3 min 22 sec`)
*Changes*: No push event to branch develop
*Tests*: `0` test/s failed out of 121 (click <http://jenkins.example.com:8080/blue/organizations/jenkins/folder%2Fmbp/detail/master/1/tests|here> for further details)
*Steps failures*: `3` (click <http://jenkins.example.com:8080/blue/organizations/jenkins/folder%2Fmbp/detail/master/1/artifacts|here> and open `build.md` for further details)
, tokenCredentialId=test})

[ghost]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

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Build stats

• Build Cause: Pull request #1033 opened

• Start Time: 2021-03-11T11:45:13.374+0000

• Duration: 11 min 44 sec

• Commit: 6fffea2

Test stats 🧪

Test	Results
Failed	0
Passed	1062
Skipped	2
Total	1064

Trends 🧪

💚 Flaky test report

Tests succeeded.

Expand to view the summary

Test stats 🧪

Test	Results
Failed	0
Passed	1062
Skipped	2
Total	1064