chore(docs): update information about dev-container-features-test-lib's functions#899

koralowiec wants to merge 4 commits intodevcontainers:maindevcontainers/cli:mainfrom

koralowiec:chore/update-test-docs-lib-commandskoralowiec/devcontainers-cli:chore/update-test-docs-lib-commandsCopy head branch name to clipboard