feat: Update test harness (copy test files) #1467

Signed-off-by: christian.lutnik <christian.lutnik@dynatrace.com>

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "test-harness"]
-	path = test-harness
-	url = https://github.com/open-feature/test-harness.git
 [submodule "spec"]
 	path = spec
 	url = https://github.com/open-feature/spec.git

pyproject.toml

@@ -49,7 +49,7 @@ cov = [
 ]
 e2e = [
     "git submodule update --init",
-    "cp test-harness/features/evaluation.feature tests/features/",
+    "cp spec/specification/assets/gherkin/*.feature tests/features/",
     "behave tests/features/",
     "rm tests/features/*.feature",
 ]