add docstrings compiler tests #5510

Job	Run time
build-compiler (ubuntu-latest, ocaml-variants.5.2.1+options,ocaml-option-static, true, true, true...	3m 30s
build-rewatch (macos-13, x86_64-apple-darwin)	20s
build-compiler (buildjet-2vcpu-ubuntu-2204-arm, ocaml-variants.5.2.1+options,ocaml-option-static,...	9m 31s
build-rewatch (macos-14, aarch64-apple-darwin)	13s
build-rewatch (ubuntu-latest, x86_64-unknown-linux-musl)	8s
build-compiler (macos-13, 5.2.1, true)	10m 21s
build-rewatch (buildjet-2vcpu-ubuntu-2204-arm, aarch64-unknown-linux-musl)	13s
build-compiler (macos-14, 5.2.1, true)	10m 24s
build-rewatch (windows-latest, x86_64-pc-windows-gnu)	28s
build-compiler (windows-latest, 5.2.1, true)	3m 16s
build-compiler (ubuntu-latest, ocaml-variants.5.0.0+options,ocaml-option-static)	2m 30s
build-compiler (ubuntu-latest, ocaml-variants.4.14.2+options,ocaml-option-static)	2m 25s
build-compiler (ubuntu-latest, ocaml-variants.4.13.0+options,ocaml-option-static)	2m 25s
package	1s
installationTest	1s
publish	1s
	45m 47s

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