scripts: twister: Fix overbroad Mock in environment unit tests

os.path.abspath was mocked too broadly, leading to errors for some users,
while being undetected in the CI.
This change narrows down the mock effect, fixing the problem.

Signed-off-by: Lukasz Mrugala <lukaszx.mrugala@intel.com>

scripts/tests/twister/test_environment.py

@@ -274,7 +274,8 @@ TESTDATA_3 = [
             testsuite_root=[
                 os.path.join('dummy', 'path', "tests"),
                 os.path.join('dummy', 'path', "samples")
-            ]
+            ],
+            outdir='dummy_abspath',
         ),
         mock.Mock(
             generator_cmd='ninja',
@@ -294,7 +295,8 @@ TESTDATA_3 = [
             testsuite_root=[
                 os.path.join('dummy', 'path', "tests"),
                 os.path.join('dummy', 'path', "samples")
-            ]
+            ],
+            outdir='dummy_abspath',
         ),
         mock.Mock(
             generator_cmd='make',
@@ -320,9 +322,17 @@ TESTDATA_3 = [
     ]
 )
 def test_twisterenv_init(options, expected_env):
-    with mock.patch(
-            'os.path.abspath',
-            mock.Mock(return_value='dummy_abspath')):
+    original_abspath = os.path.abspath
+
+    def mocked_abspath(path):
+        if path == 'dummy_abspath':
+            return 'dummy_abspath'
+        elif isinstance(path, mock.Mock):
+            return None
+        else:
+            return original_abspath(path)
+
+    with mock.patch('os.path.abspath', side_effect=mocked_abspath):
         twister_env = twisterlib.environment.TwisterEnv(options=options)
 
     assert twister_env.generator_cmd == expected_env.generator_cmd
@@ -339,9 +349,17 @@ def test_twisterenv_discover():
         ninja=True
     )
 
-    abspath_mock = mock.Mock(return_value='dummy_abspath')
+    original_abspath = os.path.abspath
 
-    with mock.patch('os.path.abspath', abspath_mock):
+    def mocked_abspath(path):
+        if path == 'dummy_abspath':
+            return 'dummy_abspath'
+        elif isinstance(path, mock.Mock):
+            return None
+        else:
+            return original_abspath(path)
+
+    with mock.patch('os.path.abspath', side_effect=mocked_abspath):
         twister_env = twisterlib.environment.TwisterEnv(options=options)
 
     mock_datetime = mock.Mock(
@@ -435,9 +453,17 @@ def test_twisterenv_check_zephyr_version(
         ninja=True
     )
 
-    abspath_mock = mock.Mock(return_value='dummy_abspath')
+    original_abspath = os.path.abspath
 
-    with mock.patch('os.path.abspath', abspath_mock):
+    def mocked_abspath(path):
+        if path == 'dummy_abspath':
+            return 'dummy_abspath'
+        elif isinstance(path, mock.Mock):
+            return None
+        else:
+            return original_abspath(path)
+
+    with mock.patch('os.path.abspath', side_effect=mocked_abspath):
         twister_env = twisterlib.environment.TwisterEnv(options=options)
 
     with mock.patch('subprocess.run', mock.Mock(side_effect=mock_run)):
@@ -555,9 +581,17 @@ def test_get_toolchain(caplog, script_result, exit_value, expected_log):
         ninja=True
     )
 
-    abspath_mock = mock.Mock(return_value='dummy_abspath')
+    original_abspath = os.path.abspath
 
-    with mock.patch('os.path.abspath', abspath_mock):
+    def mocked_abspath(path):
+        if path == 'dummy_abspath':
+            return 'dummy_abspath'
+        elif isinstance(path, mock.Mock):
+            return None
+        else:
+            return original_abspath(path)
+
+    with mock.patch('os.path.abspath', side_effect=mocked_abspath):
         twister_env = twisterlib.environment.TwisterEnv(options=options)
 
     with mock.patch.object(