Test

Add .gitignore for OCaml #878

Job	Run time
test_course_definition / identify_language_slugs	2s
test_course_definition / docker_lint	7s
test_course_definition / go_lint	3s
test_course_definition / js_lint	13s
test_course_definition / lint	48s
test_course_definition / markdown_lint	14s
test_course_definition / rust_lint	21s
test_course_definition / validate-schemas	13s
test_course_definition / validate-stages-naming	5s
test_course_definition / verify_templates_compiled	21s
test_course_definition / test (c)	32s
test_course_definition / test (clojure)	1m 23s
test_course_definition / test (cpp)	1m 37s
test_course_definition / test (crystal)	50s
test_course_definition / test (csharp)	54s
test_course_definition / test (elixir)	40s
test_course_definition / test (gleam)	44s
test_course_definition / test (go)	53s
test_course_definition / test (haskell)	2m 50s
test_course_definition / test (java)	1m 28s
test_course_definition / test (javascript)	32s
test_course_definition / test (kotlin)	1m 46s
test_course_definition / test (ocaml)	5m 14s
test_course_definition / test (php)	37s
test_course_definition / test (python)	27s
test_course_definition / test (ruby)	48s
test_course_definition / test (rust)	1m 14s
test_course_definition / test (scala)	2m 39s
test_course_definition / test (swift)	2m 57s
test_course_definition / test (typescript)	59s
test_course_definition / test (zig)	1m 15s
	32m 46s

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