Parametrize the default kasp test cases

Make use of pytest.mark.parametrize to split up the many default kasp
test cases into separate tests.

bin/tests/system/isctest/kasp.py

@@ -16,7 +16,7 @@ from pathlib import Path
 import re
 import subprocess
 import time
-from typing import Dict, List, Optional, Union
+from typing import Dict, List, Optional, Tuple, Union
 
 from datetime import datetime, timedelta, timezone
 
@@ -332,7 +332,9 @@ class Key:
             )
         return value
 
-    def get_signing_state(self, offline_ksk=False, zsk_missing=False) -> (bool, bool):
+    def get_signing_state(
+        self, offline_ksk=False, zsk_missing=False
+    ) -> Tuple[bool, bool]:
         """
         This returns the signing state derived from the key states, KRRSIGState
         and ZRRSIGState.
@@ -348,6 +350,7 @@ class Key:
         # Fetch key timing metadata.
         now = KeyTimingMetadata.now()
         activate = self.get_timing("Activate")
+        assert activate is not None  # to silence mypy - its implied by line above
         inactive = self.get_timing("Inactive", must_exist=False)
 
         active = now >= activate

bin/tests/system/isctest/mark.py

@@ -42,6 +42,12 @@ def with_tsan(*args):  # pylint: disable=unused-argument
     return feature_test("--tsan")
 
 
+def with_algorithm(name: str):
+    key = f"{name}_SUPPORTED"
+    assert key in os.environ, f"{key} env variable undefined"
+    return pytest.mark.skipif(os.getenv(key) != "1", reason=f"{name} is not supported")
+
+
 without_fips = pytest.mark.skipif(
     feature_test("--have-fips-mode"), reason="FIPS support enabled in the build"
 )
@@ -58,7 +64,6 @@ with_json_c = pytest.mark.skipif(
     not feature_test("--have-json-c"), reason="json-c support disabled in the build"
 )
 
-
 softhsm2_environment = pytest.mark.skipif(
     not (
         os.getenv("SOFTHSM2_CONF")