OTEL metrics exporter parameters

Setting	Value type	Description
observability.otel.metrics-url	string	The metrics' consumer URL (OTEL collector receiver endpoint, Elastic EPM etc.)
observability.otel.metrics-request-headers	string	The headers for OTEL metrics requests, formatted as HeaderName:HeaderValue\nHeaderName:HeaderValue
observability.otel.metrics-interval	number	The time interval (in seconds) for sending OTEL metrics. Default value - 5