Add CommissionedFabrics and SupportedFabrics attribute to opCreds cluster (#8138)

* Add attributes + zap files

* Add label in iOS chiptool app

* Restyled by whitespace

* Restyled by clang-format

* Review feedback

* regen files

* address review comments

* use accessor to write fabric count

* Link Accessors.cpp into various example apps

Co-authored-by: Restyled.io <commits@restyled.io>
Co-authored-by: Pankaj Garg <pgarg2@apple.com>
Co-authored-by: Boris Zbarsky <bzbarsky@apple.com>
diff --git a/examples/all-clusters-app/all-clusters-common/all-clusters-app.zap b/examples/all-clusters-app/all-clusters-common/all-clusters-app.zap
index 1b00406..2ed4af9 100644
--- a/examples/all-clusters-app/all-clusters-common/all-clusters-app.zap
+++ b/examples/all-clusters-app/all-clusters-common/all-clusters-app.zap
@@ -3356,6 +3356,36 @@
               "reportableChange": 0
             },
             {
+              "name": "supported fabrics",
+              "code": 2,
+              "mfgCode": null,
+              "side": "server",
+              "included": 1,
+              "storageOption": "RAM",
+              "singleton": 0,
+              "bounded": 0,
+              "defaultValue": "",
+              "reportable": 0,
+              "minInterval": 0,
+              "maxInterval": 65344,
+              "reportableChange": 0
+            },
+            {
+              "name": "commissioned fabrics",
+              "code": 3,
+              "mfgCode": null,
+              "side": "server",
+              "included": 1,
+              "storageOption": "RAM",
+              "singleton": 0,
+              "bounded": 0,
+              "defaultValue": "",
+              "reportable": 0,
+              "minInterval": 0,
+              "maxInterval": 65344,
+              "reportableChange": 0
+            },
+            {
               "name": "cluster revision",
               "code": 65533,
               "mfgCode": null,