feat: add deepdiff to layout tests

risk: nonprod

Author: fiedlr

gooddata-sdk/test-requirements.txt

@@ -8,3 +8,4 @@ urllib3==1.26.9
 python-dotenv~=1.0.0
 attrs>=21.4.0,<=24.2.0
 cattrs>=22.1.0,<=24.1.1
+deepdiff~=8.5.0