Tests

Introduce Atmos YAML functions `!include` and `!env` #3822

Job	Run time
Build (ubuntu-latest, linux)	2m 18s
Tidy Go Modules	37s
Build (windows-latest, windows)	9m 0s
Build (macos-latest, macos)	1m 23s
Docker Lint	23s
[lint] demo-context	6s
[localstack] demo-localstack	2m 19s
[k3s] demo-helmfile	50s
[lint] quick-start-advanced	5s
Acceptance Tests (ubuntu-latest, linux)	3m 28s
[validate] demo-context	4s
Acceptance Tests (windows-latest, windows)	9m 31s
[mock-linux] examples/demo-atlantis	7s
[validate] demo-localstack	6s
Acceptance Tests (macos-latest, macos)	2m 57s
[validate] demo-stacks	4s
[mock-linux] examples/demo-component-versions	10s
[mock-linux] examples/demo-context	10s
[validate] demo-helmfile	4s
[mock-linux] examples/demo-vendoring	25s
[validate] quick-start-advanced	4s
[mock-linux] tests/fixtures/scenarios/complete	27s
[validate] quick-start-simple	4s
[mock-windows] examples/demo-atlantis	18s
[mock-windows] examples/demo-component-versions	34s
[mock-windows] examples/demo-context	25s
[mock-windows] examples/demo-vendoring	1m 3s
[mock-windows] tests/fixtures/scenarios/complete	1m 14s
[mock-macos] examples/demo-atlantis	23s
[mock-macos] examples/demo-component-versions	16s
[mock-macos] examples/demo-context	16s
[mock-macos] examples/demo-vendoring	33s
[mock-macos] tests/fixtures/scenarios/complete	30s
release	0s
	40m 14s

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