Add isort formatter to restyled configuration (project-chip#24148)

* Add isort formatter to restyled configuration

* Sort Python imports using isort tool

This commit also removes unused imports (reported by flake8) in few
places.

* Restyled by autopep8

* Restyled by isort

* Update ZAP template for cluster Objects

* Fix E402 suppressions in connection with isort

* Fix imports which depend on modified sys path

* Fix circular dependency when importing FabricAdmin

* Restyled by isort

Co-authored-by: Restyled.io <commits@restyled.io>

Author: arkq

.isort.cfg

@@ -0,0 +1,2 @@
+[settings]
+line_length = 132

.restyled.yaml

@@ -213,7 +213,7 @@ restylers:
           - "**/*.sh"
           - "**/*.bash"
     - name: autopep8
-      image: 'restyled/restyler-autopep8:v1.5.7'
+      image: 'restyled/restyler-autopep8:v2.0.0'
       command:
         - autopep8
         - '--in-place'
@@ -222,3 +222,12 @@ restylers:
         - '**/*.py'
       interpreters:
         - python
+    - name: isort
+      image: 'restyled/restyler-isort:v5.11.2'
+      command:
+        - isort
+      arguments: []
+      include:
+        - '**/*.py'
+      interpreters:
+        - python