fix: do not use a local package-registry

[mdelapenya]

What does this PR do?

This PR reverts #1743, also forcing the elastic-package provider to use the staging environment of EPR, not starting a local package-registry

Why is it important?

Keep behaviours in sync with all branches

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

• Reverts fix: run local package registry with docker provider #1743
• Relates fix: use staging env for package registry #1752
• Relates fix: use staging environment for EPR #1753

[elasticmachine]

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• Start Time: 2021-11-02T14:48:10.858+0000

• Duration: 12 min 7 sec

• Commit: 0c9f7b5

Test stats 🧪

Test	Results
Failed	0
Passed	131
Skipped	0
Total	131

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Install precommit hooks

• Took 0 min 1 sec . View more details here
• Description: export PATH=/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/.gvm/versions/go1.16.3.linux.amd64/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/src/github.com/elastic/e2e-testing/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/src/github.com/elastic/e2e-testing/.ci/scripts ## Install with the hooks therefore ~/.cache/pre-commit will be created with the repos pre-commit install --install-hooks

Install precommit hooks

• Took 0 min 2 sec . View more details here
• Description: export PATH=/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/.gvm/versions/go1.16.3.linux.amd64/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/src/github.com/elastic/e2e-testing/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/bin:/var/lib/jenkins/workspace/2e-tests_e2e-testing-mbp_PR-1756/src/github.com/elastic/e2e-testing/.ci/scripts ## Install with the hooks therefore ~/.cache/pre-commit will be created with the repos pre-commit install --install-hooks

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[mdelapenya]

Merging as the ARM test (docker-compose based) suite is back to green, and AMD (elastic-package based) is green too

[elasticmachine]

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Build stats

• Start Time: 2021-11-02T15:25:17.933+0000

• Duration: 43 min 13 sec

• Commit: 5e19c26

Test stats 🧪

Test	Results
Failed	0
Passed	248
Skipped	0
Total	248

💚 Flaky test report

Tests succeeded.

🤖 GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.