Merge atmos specific and terraform help documentation #3407

Job	Run time
Build (ubuntu-latest, linux)	2m 11s
Build (windows-latest, windows)	7m 10s
Build (macos-latest, macos)	3m 0s
[localstack] demo-localstack	2m 27s
Acceptance Tests (ubuntu-latest, linux)	1m 18s
Docker Lint	2m 16s
[k3s] demo-helmfile	35s
Acceptance Tests (windows-latest, windows)	5m 34s
Acceptance Tests (macos-latest, macos)	1m 42s
[lint] demo-context	10s
[lint] quick-start-advanced	7s
[validate] demo-context	4s
[mock-linux] examples/demo-atlantis	11s
[validate] demo-localstack	3s
[mock-linux] examples/demo-component-versions	17s
[validate] demo-stacks	4s
[mock-linux] examples/demo-context	15s
[validate] demo-helmfile	6s
[mock-linux] examples/demo-vendoring	18s
[validate] quick-start-advanced	4s
[mock-linux] tests/fixtures/scenarios/complete	19s
[validate] quick-start-simple	4s
[mock-windows] examples/demo-atlantis	18s
[mock-windows] examples/demo-component-versions	29s
[mock-windows] examples/demo-context	28s
[mock-windows] examples/demo-vendoring	52s
[mock-windows] tests/fixtures/scenarios/complete	48s
[mock-macos] examples/demo-atlantis	14s
[mock-macos] examples/demo-component-versions	18s
[mock-macos] examples/demo-context	15s
[mock-macos] examples/demo-vendoring	26s
[mock-macos] tests/fixtures/scenarios/complete	33s
release	0s
	32m 56s

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