`munit` has gotten perceivably slower when bumping `v0.7.29` => `v1.0.0`

[Gedochao]

Version
Noticed when bumping munit v0.7.29 => v1.0.0

Replication
Haven't got the time to minimise this, but here's what I got:

• check out the Scala CLI repo (VirtusLab/scala-cli@d905510)
• run the following unit tests with munit v1.0.0:

./mill -i 'build-module[].test' 'scala.build.tests.BuildTests*.compile 12k sources for Scala*'

• the tests fail on the CI (GH actions standard runner) and a subset of them also fail on my local machine with a timeout
• what fixes it is increasing munitTimeout from the default 30s to 120s: VirtusLab/scala-cli@d8b5b49

The test in question is here:

• https://github.com/VirtusLab/scala-cli/blob/d9055102c6ab55553e784d031969742b3c5419db/modules/build/src/test/scala/scala/build/tests/BuildTests.scala#L942-L959

Context
I'll still update Scala CLI to munit v1.0.0, as I need the Scala Native 0.5.x support, so can't afford to stay on v0.7.29. Still, I wonder if this performance drop is expected.

• Update munit to 1.0.0 VirtusLab/scala-cli#2935