TRA-3868 move tapped pod watch and tapper updating to shared (#416)

* WIP

* WIP

* WIP

* WIP

* WIP

* Update tapRunner.go and k8sTapManager.go

* Update cleanRunner.go, common.go, and 8 more files...

* Update common.go, tapConfig.go, and 2 more files...

* Update config.go, config.go, and 5 more files...

* Update tapRunner.go, config.go, and 7 more files...

* Update cleanRunner.go, logs.go, and 2 more files...

* Update k8sTapManager.go, provider.go, and watch.go

* Update go.sum, go.mod, and go.sum

* Update go.mod and go.sum

* Update go.mod, go.sum, and 2 more files...

* Revert "Update go.mod, go.sum, and 2 more files..."

This reverts commit 8140311349.

* Update funcWrappers.go, tapRunner.go, and 4 more files...

* Update main.go, tapRunner.go, and mizuTapperSyncer.go

shared/kubernetes/utils.go

@@ -0,0 +1,57 @@
+package kubernetes
+
+import (
+	core "k8s.io/api/core/v1"
+	"regexp"
+)
+
+func GetNodeHostToTappedPodIpsMap(tappedPods []core.Pod) map[string][]string {
+	nodeToTappedPodIPMap := make(map[string][]string, 0)
+	for _, pod := range tappedPods {
+		existingList := nodeToTappedPodIPMap[pod.Spec.NodeName]
+		if existingList == nil {
+			nodeToTappedPodIPMap[pod.Spec.NodeName] = []string{pod.Status.PodIP}
+		} else {
+			nodeToTappedPodIPMap[pod.Spec.NodeName] = append(nodeToTappedPodIPMap[pod.Spec.NodeName], pod.Status.PodIP)
+		}
+	}
+	return nodeToTappedPodIPMap
+}
+
+func excludeMizuPods(pods []core.Pod) []core.Pod {
+	mizuPrefixRegex := regexp.MustCompile("^" + MizuResourcesPrefix)
+
+	nonMizuPods := make([]core.Pod, 0)
+	for _, pod := range pods {
+		if !mizuPrefixRegex.MatchString(pod.Name) {
+			nonMizuPods = append(nonMizuPods, pod)
+		}
+	}
+
+	return nonMizuPods
+}
+
+func getPodArrayDiff(oldPods []core.Pod, newPods []core.Pod) (added []core.Pod, removed []core.Pod) {
+	added = getMissingPods(newPods, oldPods)
+	removed = getMissingPods(oldPods, newPods)
+
+	return added, removed
+}
+
+//returns pods present in pods1 array and missing in pods2 array
+func getMissingPods(pods1 []core.Pod, pods2 []core.Pod) []core.Pod {
+	missingPods := make([]core.Pod, 0)
+	for _, pod1 := range pods1 {
+		var found = false
+		for _, pod2 := range pods2 {
+			if pod1.UID == pod2.UID {
+				found = true
+				break
+			}
+		}
+		if !found {
+			missingPods = append(missingPods, pod1)
+		}
+	}
+	return missingPods
+}