lower-bounds check does not correctly process the output

[MisterDA]

Compare https://ci.ocamllabs.io/github/MisterDA/domainslib/commit/43adf693b656a30c67766b4f449efaa71dd2576b/variant/(lint-lower-bounds) with https://ci.ocamllabs.io/github/MisterDA/domainslib/commit/43adf693b656a30c67766b4f449efaa71dd2576b/variant/debian-11-5.0_arm32_opam-2.1.
You'll see that ansi escape codes (colors, returns) are not processed.

[benmandrew]

After some exploration, I haven't been able to track down exactly what causes this. I believe it has something to do with the versions of dune or alcotest being chosen for the lower bounds. However, when I locally run the tests for domainslib on a switch with the lower-bound package selection, it outputs correctly.

To clarify, this issue seems only to affect test output.

Incorrect colours:
dune.3.3.0 - https://ci.ocamllabs.io/github/MisterDA/domainslib/commit/43adf693b656a30c67766b4f449efaa71dd2576b/variant/(lint-lower-bounds)
dune.3.0.2 - https://ci.ocamllabs.io/github/inhabitedtype/bigstringaf/commit/4ca34d97fabd1831a6458e4a1e6d49f1bfd0223f/variant/(lint-lower-bounds)
dune.2.9.1 - https://ci.ocamllabs.io/github/dune-universe/duniverse-lint/commit/635a6cdf7f4ea838c061009c63771f62a28082fb/variant/(lint-lower-bounds)
dune.2.3.0 - https://ci.ocamllabs.io/github/kit-ty-kate/spdx_licenses/commit/ebc88c503f2bfb9abc4c3d7748d428e82dcda6b1/variant/(lint-lower-bounds)