fix(ci): wait for downstream jobs on scheduled jobs

[mdelapenya]

What does this PR do?

It forces the scheduled pipelines to wait for the downstream job.

Why is it important?

Setting propagate: true is not enough, as it seems Jenkins is not able to update the state of a build once it has finished. Adding wait: true we expect to achieve what we want.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have run the Unit tests (make unit-test), and they are passing locally
• I have run the End-2-End tests for the suite I'm working on, and they are passing locally
• I have noticed new Go dependencies (run make notice in the proper directory)

Related issues

• Completes chore(ci): propagate downstream build result to upstream #1377
• Closes Propagate build result in scheduled builds #1376

Screenshots

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• Start Time: 2021-07-28T08:15:11.432+0000

• Duration: 32 min 18 sec

• Commit: cdd1168

Test stats 🧪

Test	Results
Failed	0
Passed	231
Skipped	0
Total	231

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Test stats 🧪

Test	Results
Failed	0
Passed	231
Skipped	0
Total	231

[mdelapenya]

Not adding v7.13.x because k8s-autodiscover test suite is not present in that branch