Add kibana-core-ui-designers team (#74970)

Author: ryankeairns

.github/CODEOWNERS

@@ -8,7 +8,7 @@
 /x-pack/plugins/lens/ @elastic/kibana-app
 /x-pack/plugins/graph/ @elastic/kibana-app
 /src/plugins/dashboard/ @elastic/kibana-app
-/src/plugins/dashboard/**/*.scss @elastic/kibana-core-ui
+/src/plugins/dashboard/**/*.scss @elastic/kibana-core-ui-designers
 /src/plugins/discover/ @elastic/kibana-app
 /src/plugins/input_control_vis/ @elastic/kibana-app
 /src/plugins/kibana_legacy/ @elastic/kibana-app
@@ -70,7 +70,7 @@
 
 # Canvas
 /x-pack/plugins/canvas/  @elastic/kibana-canvas
-/x-pack/plugins/canvas/**/*.scss @elastic/kibana-core-ui
+/x-pack/plugins/canvas/**/*.scss @elastic/kibana-core-ui-designers
 /x-pack/test/functional/apps/canvas/  @elastic/kibana-canvas
 
 # Core UI
@@ -80,7 +80,7 @@
 /src/plugins/home/server/services/ @elastic/kibana-core-ui
 # Exclude tutorial resources folder for now because they are not owned by Kibana app and most will move out soon
 /src/legacy/core_plugins/kibana/public/home/*.ts @elastic/kibana-core-ui
-/src/legacy/core_plugins/kibana/public/home/**/*.scss @elastic/kibana-core-ui
+/src/legacy/core_plugins/kibana/public/home/**/*.scss @elastic/kibana-core-ui-designers
 /src/legacy/core_plugins/kibana/public/home/np_ready/ @elastic/kibana-core-ui
 
 # Observability UIs
@@ -165,14 +165,14 @@
 # Security
 /src/core/server/csp/  @elastic/kibana-security @elastic/kibana-platform
 /x-pack/legacy/plugins/security/  @elastic/kibana-security
-/x-pack/legacy/plugins/security/**/*.scss @elastic/kibana-core-ui
+/x-pack/legacy/plugins/security/**/*.scss @elastic/kibana-core-ui-designers
 /x-pack/legacy/plugins/spaces/  @elastic/kibana-security
-/x-pack/legacy/plugins/spaces/**/*.scss @elastic/kibana-core-ui
+/x-pack/legacy/plugins/spaces/**/*.scss @elastic/kibana-core-ui-designers
 /x-pack/plugins/spaces/  @elastic/kibana-security
-/x-pack/plugins/spaces/**/*.scss @elastic/kibana-core-ui
+/x-pack/plugins/spaces/**/*.scss @elastic/kibana-core-ui-designers
 /x-pack/plugins/encrypted_saved_objects/  @elastic/kibana-security
 /x-pack/plugins/security/  @elastic/kibana-security
-/x-pack/plugins/security/**/*.scss @elastic/kibana-core-ui
+/x-pack/plugins/security/**/*.scss @elastic/kibana-core-ui-designers
 /x-pack/test/api_integration/apis/security/ @elastic/kibana-security
 
 # Kibana Localization