GCTime is registered as a Counter, instead of Gauge

[pgunapal]

In the Micrometer Base Metrics implementation, the Garbage Collection Time is being registered as a Counter Metric Type, instead of a Gauge.
https://github.com/smallrye/smallrye-metrics/blob/5dedbc257fefe4d7b5b275f91c217b5de9e08717/implementation/src/main/java/io/smallrye/metrics/base/LegacyBaseMetrics.java#L86C29-L86C29

In the MicroProfile Metrics Specification, it is listed that the GCTime metric type should be Gauge.
https://download.eclipse.org/microprofile/microprofile-metrics-5.0.1/microprofile-metrics-spec-5.0.1.html#_general_jvm_stats

GCTime - Approximate accumulated collection elapsed time in ms

Name	gc.time
Type	Gauge
Unit	Seconds
Multi	true
Tags	{name=%s}
Description	Displays the approximate accumulated collection elapsed time in seconds. This attribute displays -1 if the collection elapsed time is undefined for this collector. The Java virtual machine implementation may use a high resolution timer to measure the elapsed time. This attribute may display the same value even if the collection count has been incremented if the collection elapsed time is very short.
MBean	java.lang:type=GarbageCollector,name=%s/CollectionTime
Notes	There can be multiple garbage collectors active that are assigned to different memory pools. The %s should be substituted with the name of the garbage collector. The MicroProfile Metrics runtime will need to convert the metric’s value to seconds if the value is provided in a different unit.