refactor: bpfSupportedMetrics usage in NewStats()

Remove the need to pass bpfSupportedMetrics through
n layers of function calls that lead to NewStats()
by adding a reasonable default set of bpfmetrics
that the exporter will/can then override when it's
started.

Signed-off-by: Maryam Tahhan <[email protected]>

pkg/collector/stats/utils.go

@@ -22,6 +22,7 @@ import (
 	"os/exec"
 	"regexp"
 	"runtime"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -92,6 +93,10 @@ func GetProcessFeatureNames(bpfSupportedMetrics bpf.SupportedMetrics) []string {
 	return metrics
 }
 
+func AvailableBPFMetricsHas(s string) bool {
+	return slices.Contains(AvailableBPFMetrics, s)
+}
+
 func GetNodeName() string {
 	if nodeName := os.Getenv("NODE_NAME"); nodeName != "" {
 		return nodeName