Add support for capturing configuration of otlp from environment variables with QUARKUS prefix

[cuichenli]

At the moment, the otlp registry will only try to capture configurations from environment variable like OTEL_SERVICE_NAME and OTEL_RESOURCE_ATTRIBUTES. But the chance is we may specify those environment variable with a QUARKUS prefix and these will not be captured.

quarkus-micrometer-registry/micrometer-registry-otlp/runtime/src/main/java/io/quarkiverse/micrometer/registry/otlp/OtlpConfig.java

Line 73 in b7ddc62

* Defaults to empty. If not set it tries to use OTEL_RESOURCE_ATTRIBUTES and OTEL_SERVICE_NAME to automatically

So it would be great if the configuration can also try to capture those ones with a quarkus prefix. Please feel free to correct me if I got anything wrong. Thanks