Unclear advice when upgrading mockk from 1.14.7 to 1.14.9

Renovate tried to upgrade this for me but failed at buildHealth.
DAGP suggests to:
```
Advice for root project
These transitive dependencies should be declared directly:
testImplementation("io.mockk:mockk-core:1.14.9")
```
Reproducer:
https://github.com/patrick-dedication/dagp-mockk-advice

I ran `gradle :reason --id "io.mockk:mockk-core:1.14.9"`, but this only shows the shortest dep paths.
I can't figure out why the advice is given, I don't seem to use a type from mockk-core.
When I add the following it works just fine:
`configurations.testCompileClasspath { exclude("io.mockk", "mockk-core") }`

Start with the linked dagp-mockk-advice reproducer and run `gradle :reason --id "io.mockk:mockk-core:1.14.9"` to compare the reported dependency paths with the build-health advice. Done means the upgrade behavior is explained and the incorrect advice is corrected or the required workaround is documented.

Written by the indexing model from the issue text.