Fix multi rooted path tree scanning in the Qute processor

[aloubyansky]

Fix #40366 and quarkiverse/quarkus-web-bundler#197

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 195deab.

Failing Jobs

Status	Name	Step	Failures	Logs	Raw logs	Build scan
✖	Native Tests - HTTP	Build	Failures	Logs	Raw logs	🔍

You can consult the Develocity build scans.

Failures

⚙️ Native Tests - HTTP #

- Failing: integration-tests/rest-client 

📦 integration-tests/rest-client

✖ Failed to execute goal uk.co.automatictester:truststore-maven-plugin:3.0.0:generate-truststore (self-signed-truststore) on project quarkus-integration-test-rest-client: Execution self-signed-truststore of goal uk.co.automatictester:truststore-maven-plugin:3.0.0:generate-truststore failed: Unable to establish TLS connection with: self-signed.badssl.com:443

[aloubyansky]

Given #40158 has backport-3.8 label, i added it to this PR as well

[ia3andy]

Looking good!

So if I understand well:
You use the getRelativePath which is directly using the given path separator, so no os problems. Also the relativise doesn't need to be done using the full Path, it's just stripping a part of the string, therefore no fs issues.

[mkouba]

Looks good but I wanted to add a test with src/main/resources/templates and src/test/resources/templates template roots. But never mind, I'll add one in a follow-up pr.