CI: Fix native matrix calculation for modules with slash

[famod]

Fixes #17101 (comment)

[famod]

@geoand @gsmet I think this should be merged rather quickly because many PRs will now run into this problem, I fear.

[quarkus-bot]

Failing Jobs - Building 524ac29

Status	Name	Step	Test failures	Logs	Raw logs
✖	Gradle Tests - JDK 11 Linux	Build	Test failures	Logs	Raw logs
✖	Gradle Tests - JDK 11 Windows	Build	Test failures	Logs	Raw logs

Full information is available in the Build summary check run.

Test Failures

⚙️ Gradle Tests - JDK 11 Linux #

📦 integration-tests/gradle

✖ io.quarkus.gradle.BeanInTestSourcesTest.testBasicMultiModuleBuild() line 15 - More details - Source on GitHub

✖ io.quarkus.gradle.KotlinGRPCProjectBuildTest.testBasicMultiModuleBuild() line 16 - More details - Source on GitHub

✖ io.quarkus.gradle.MultiModuleKotlinProjectBuildTest.testBasicMultiModuleBuild() line 15 - More details - Source on GitHub

✖ io.quarkus.gradle.MultiSourceProjectTest.shouldRunTest() line 16 - More details - Source on GitHub

✖ io.quarkus.gradle.devmode.MultiModuleKotlinProjectDevModeTest.main() line 22 - More details - Source on GitHub

---

⚙️ Gradle Tests - JDK 11 Windows #

📦 integration-tests/gradle

✖ io.quarkus.gradle.BeanInTestSourcesTest.testBasicMultiModuleBuild() line 15 - More details - Source on GitHub

✖ io.quarkus.gradle.KotlinGRPCProjectBuildTest.testBasicMultiModuleBuild() line 16 - More details - Source on GitHub

✖ io.quarkus.gradle.MultiModuleKotlinProjectBuildTest.testBasicMultiModuleBuild() line 15 - More details - Source on GitHub

✖ io.quarkus.gradle.MultiSourceProjectTest.shouldRunTest() line 16 - More details - Source on GitHub

✖ io.quarkus.gradle.devmode.MultiModuleKotlinProjectDevModeTest.main() line 22 - More details - Source on GitHub

[famod]

I'll gladly take the blame if it makes things worse. 😉