add native CL metrics and placeholders

fold this into respective commits

Author: umanwizard

metrics/ids.go

@@ -2016,6 +2016,83 @@
     "field": "bpf.golabels.errors",
     "id": 279
   },
+  {
+    "description": "placeholder, will be added in a future PR",
+    "type": "counter",
+    "name": "placeholder280",
+    "field": "placeholder280",
+    "id": 280
+  },
+  {
+    "description": "placeholder, will be added in a future PR",
+    "type": "counter",
+    "name": "placeholder281",
+    "field": "placeholder281",
+    "id": 281
+  },
+  {
+    "description": "Number of failures to get TSD base for native custom labels",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsErrReadTsdBase",
+    "field": "bpf.native_custom_labels.errors.read_tsd_base",
+    "id": 282
+  },
+  {
+    "description": "Number of failures to read native custom labels thread-local object",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsErrReadData",
+    "field": "bpf.native_custom_labels.errors.read_data",
+    "id": 283
+  },
+  {
+    "description": "Number of failures to read native custom labels key buffer",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsErrReadKey",
+    "field": "bpf.native_custom_labels.errors.read_key",
+    "id": 284
+  },
+  {
+    "description": "Number of failures to read native custom labels value buffer",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsErrReadValue",
+    "field": "bpf.native_custom_labels.errors.read_value",
+    "id": 285
+  },
+  {
+    "description": "Number of successful reads of native custom labels",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsReadSuccesses",
+    "field": "bpf.native_custom_labels.read.successes",
+    "id": 286
+  },
+  {
+    "description": "Total number of failures to add native custom labels",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsAddErrors",
+    "field": "bpf.native_custom_labels.add.errors",
+    "id": 287
+  },
+  {
+    "description": "Number of successes adding native custom labels",
+    "type": "counter",
+    "name": "UnwindNativeCustomLabelsAddSuccesses",
+    "field": "bpf.native_custom_labels.add.successes",
+    "id": 288
+  },
+  {
+    "description": "placeholder, will be added in a future PR",
+    "type": "counter",
+    "name": "placeholder289",
+    "field": "placeholder289",
+    "id": 289
+  },
+  {
+    "description": "placeholder, will be added in a future PR",
+    "type": "counter",
+    "name": "placeholder290",
+    "field": "placeholder290",
+    "id": 290
+  },
   {
     "description": "Number of attempts to read Node.js custom labels",
     "type": "counter",