Trim configuration values automatically in the quarkus namespace

[radcortez]

Description

Because of the way that properties files work, configuration values may contain trailing whitespaces when read from this type of configuration source. The rationale was to not mess with the value because we don't know if the whitespace is intended or not.

Unfortunately, this seems to cause more harm than good:

• Trim string values defined in the Hibernate ORM configuration #22816
• Property values can behave unexpectedly with trailing spaces #22740
• Trailing whitespace after quarkus.jaeger.sampler-param=1 fails to build #5116
• ClassNotFoundException with quarkus.hibernate-search.elasticsearch.analysis.configurer #5305
• Authorization using properties does not work #13787
• Automatically remove trailing spaces in the application.properties file #19956

The fix usually requires us to go to the problematic property and apply the TrimmingConverter.

Implementation ideas

We could trim automatically every property in the quarkus namespace. This will probably fix all related issues (and future issues) and still keep the original behavior for user configuration.

Potentially, this can be a breaking / inconvenient change even for quarkus configuration. Thinking about properties that set names to be passed to other services that may contain trailing whitespaces, so we need to discuss this carefully.