Use library functions for getting leapp packages

Instead of harcoded list of leapp packages let's rely on
native leapp library functions that were introduced a few
commits ago.

OAMG-5645

repos/system_upgrade/common/actors/peseventsscanner/libraries/pes_events_scanner.py

@@ -5,6 +5,7 @@
 from leapp.exceptions import StopActorExecutionError
 from leapp.libraries.actor import peseventsscanner_repomap
 from leapp.libraries.actor.pes_event_parsing import Action, get_pes_events, Package
+from leapp.libraries.common import rpms
 from leapp.libraries.common.config import version
 from leapp.libraries.stdlib import api
 from leapp.libraries.stdlib.config import is_verbose
@@ -481,11 +482,8 @@ def apply_transaction_configuration(source_pkgs):
 
 
 def remove_leapp_related_events(events):
-    leapp_pkgs = [
-        'leapp', 'leapp-deps', 'leapp-upgrade-el7toel8', 'leapp-upgrade-el8toel9',
-        'leapp-upgrade-el7toel8-deps', 'leapp-upgrade-el8toel9-deps', 'python2-leapp',
-        'python3-leapp', 'snactor'
-    ]
+    leapp_pkgs = rpms.get_leapp_dep_packages(
+            major_version=['7', '8']) + rpms.get_leapp_packages(major_version=['7', '8'])
     res = []
     for event in events:
         if not any(pkg.name in leapp_pkgs for pkg in event.in_pkgs):

repos/system_upgrade/common/actors/peseventsscanner/tests/test_pes_event_scanner.py

@@ -404,7 +404,10 @@ def test_pkgs_are_demodularized_when_crossing_major_version(monkeypatch):
     assert target_pkgs == expected_target_pkgs
 
 
-def test_remove_leapp_related_events():
+def test_remove_leapp_related_events(monkeypatch):
+    # NOTE(ivasilev) That's required to use leapp library functions that rely on calls to
+    # get_source/target_system_version functions
+    monkeypatch.setattr(api, 'current_actor', CurrentActorMocked(arch='x86_64', src_ver='7.9', dst_ver='8.8'))
     # these are just hypothetical and not necessarily correct
     package_set_two_leapp = {Package('leapp-upgrade-el7toel8', 'repoid-rhel7', None),
                              Package('leapp-upgrade-el7toel8-deps', 'repoid-rhel7', None)}