[8.4](backport #1175) ci: move macos to github actions

[mergify]

This is an automatic backport of pull request #1175 done by Mergify.

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[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2022-09-13T17:32:39.648+0000

• Duration: 69 min 22 sec

Test stats 🧪

Test	Results
Failed	0
Passed	9793
Skipped	35
Total	9828

💚 Flaky test report

Tests succeeded.

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• /test : Re-trigger the build.

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• run integration tests : Run the Elastic Agent Integration tests.

• run end-to-end tests : Generate the packages and run the E2E Tests.

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	97.297% (72/74)	👍
Files	68.86% (157/228)	👍
Classes	69.111% (311/450)	👍
Methods	52.995% (867/1636)	👍
Lines	39.093% (9382/23999)	👍 0.008
Conditionals	100.0% (0/0)	💚