feat #184: use konstruct and remove serializer generator processor

[lilgallon]

closes #184

-> maintenance of kotlinx.serializers will be handled in another independent project (which has nothing to do with ocpi)

Added deprecation notice (the IDE should automatically detect and suggest to fix it):

Only for users explicitly calling OCPI serializers:

import com.izivia.ocpi.toolkit.integrations.kotlinx.serialization.generated.generatedSerializersModule
// will be changed to:
import com.izivia.ocpi.toolkit.integrations.kotlinx.serialization.ocpiSerializersModule

[lilgallon]

Tested internally on a project using kotlinx.serialization support ✅

No backward incompatibility. The field becomes deprecated and IntelliJ automatically detects what should be changed. With the old and the new field, everything works as expected

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud