feat(health): add Logstash resource customization (#22028)

Signed-off-by: Francis Provencher <fprovencher@drw.com>

resource_customizations/logstash.k8s.elastic.co/Logstash/health.lua

@@ -0,0 +1,20 @@
+local hs = {}
+if obj.status ~= nil and obj.status.health ~= nil then
+  if obj.status.health == "green" then
+    hs.status = "Healthy"
+    hs.message = "Logstash status is Green"
+    return hs
+  elseif obj.status.health == "yellow" then
+    hs.status = "Progressing"
+    hs.message = "Logstash status is Yellow"
+    return hs
+  elseif obj.status.health == "red" then
+    hs.status = "Degraded"
+    hs.message = "Logstash status is Red"
+    return hs
+  end
+end
+
+hs.status = "Progressing"
+hs.message = "Waiting for Logstash"
+return hs

resource_customizations/logstash.k8s.elastic.co/Logstash/health_test.yaml

@@ -0,0 +1,17 @@
+tests:
+- healthStatus:
+    status: Healthy
+    message: "Logstash status is Green"
+  inputPath: testdata/green.yaml
+- healthStatus:
+    status: Progressing
+    message: "Logstash status is Yellow"
+  inputPath: testdata/yellow.yaml
+- healthStatus:
+    status: Degraded
+    message: "Logstash status is Red"
+  inputPath: testdata/red.yaml
+- healthStatus:
+    status: Progressing
+    message: "Waiting for Logstash"
+  inputPath: testdata/unknown.yaml

resource_customizations/logstash.k8s.elastic.co/Logstash/testdata/green.yaml

@@ -0,0 +1,6 @@
+apiVersion: logstash.k8s.elastic.co/v1alpha1
+kind: Logstash
+metadata:
+  name: quickstart
+status:
+  health: green

resource_customizations/logstash.k8s.elastic.co/Logstash/testdata/red.yaml

@@ -0,0 +1,6 @@
+apiVersion: logstash.k8s.elastic.co/v1alpha1
+kind: Logstash
+metadata:
+  name: quickstart
+status:
+  health: red

resource_customizations/logstash.k8s.elastic.co/Logstash/testdata/unknown.yaml

@@ -0,0 +1,5 @@
+apiVersion: logstash.k8s.elastic.co/v1alpha1
+kind: Logstash
+metadata:
+  name: quickstart
+status: {}

resource_customizations/logstash.k8s.elastic.co/Logstash/testdata/yellow.yaml

@@ -0,0 +1,6 @@
+apiVersion: logstash.k8s.elastic.co/v1alpha1
+kind: Logstash
+metadata:
+  name: quickstart
+status:
+  health: yellow