Enable to add new JsonDicomConfigurationExtension by CDI Producers

[gunterze]

Replace hard-coded list of registered JsonDicomConfigurationExtensions

    @Produces
    @ApplicationScoped
    public static JsonConfiguration newJsonConfiguration() {
        JsonConfiguration config = new JsonConfiguration();
        config.addJsonConfigurationExtension(new JsonAuditLoggerConfiguration());
        config.addJsonConfigurationExtension(new JsonAuditRecordRepositoryConfiguration());
        config.addJsonConfigurationExtension(new JsonImageReaderConfiguration());
        config.addJsonConfigurationExtension(new JsonImageWriterConfiguration());
        JsonHL7Configuration hl7Config = new JsonHL7Configuration();
        hl7Config.addHL7ConfigurationExtension(new JsonArchivHL7Configuration());
        config.addJsonConfigurationExtension(hl7Config);
        config.addJsonConfigurationExtension(new JsonArchiveConfiguration());
        config.addJsonConfigurationExtension(new JsonArchiveUIConfiguration());
        return config;
    }

by

    @Produces
    @ApplicationScoped
    public static JsonConfiguration newJsonConfiguration(Instance<JsonConfigurationExtension> configExts) {

So a JsonDicomConfigurationExtension can be added by declaring its implementation class as @ApplicationScoped bean, e.g.:

@ApplicationScoped
public class JsonArchiveUIConfiguration extends JsonConfigurationExtension {

or providing it by a Producer method or field, e.g.

    @Produces
    @ApplicationScoped
    private static JsonAuditLoggerConfiguration jsonAuditLoggerConfiguration =
            new JsonAuditLoggerConfiguration();

Related #2797