kaptTest not detected as kapt usage

**Build scan link**
http://gradle.affirm-dev.com/s/3irzggszoazni

**Plugin version**
1.13.1

**Gradle version**
7.5

**(Optional) Android Gradle Plugin (AGP) version**
7.2.1

**`reason` output for bugs relating to incorrect advice**
> Unused plugins that can be removed:
> kotlin-kapt: this project has the kotlin-kapt (org.jetbrains.kotlin.kapt) plugin applied, but there are no used annotation processors.

**Describe the bug**
I have a `kaptTest` dependency on Dagger. The plugin suggests KAPT removal.

**To Reproduce**
Steps to reproduce the behavior:
1) Add a `kaptTest` dependency on Dagger (`com.google.dagger:dagger:2.42`).
2) Run dependency analysis.

**Expected behavior**
When I have `kaptTest` dependencies then the plugin shouldn't suggest KAPT plugin removal.

Reproduce with a kaptTest dependency on com.google.dagger:dagger:2.42 using plugin 1.13.1, Gradle 7.5, and AGP 7.2.1, then trace the dependency-analysis logic that decides whether kapt is used. Done means the advice no longer recommends removing kotlin-kapt when kaptTest processors are present, with a regression test covering the case.

Written by the indexing model from the issue text.