Adjust avc check setup and fix docs generation (#3373)

* Allow individual tests set their `avc` checks as needed

Let's go the other way round: Enable the check by default, allow
individual tests to set it according to their needs by a simple
definition and disable it globally when not initiated by packit.

* Explore all available plugins when generating docs

We also need test checks and who knows what else in the future as
well. So let's just explore them all.

docs/scripts/generate-stories.py

@@ -53,8 +53,8 @@ def main() -> None:
     logger = tmt.Logger.create()
     logger.add_console_handler()
 
-    # Explore available *export* plugins - do not import other plugins, we don't need them.
-    tmt.plugins.explore_export_package(logger)
+    # Explore available plugins
+    tmt.plugins.explore(logger)
 
     # Generate stories
     tree = tmt.Tree(logger=logger, path=Path.cwd())

tests/main.fmf

@@ -3,10 +3,14 @@ framework: beakerlib
 contact: Petr Šplíchal <[email protected]>
 tier: 2
 require: [tmt]
+check: [avc]
 duration: 10m
 environment:
     TMT_FEELING_SAFE: 1
 
 adjust:
-  - check: [avc]
-    when: initiator == packit
+  - check: []
+    when: initiator is not defined or initiator != packit
+    because:
+        we don't want to run the avc check for local testing as it
+        needs root and we're executing tests under a regular user

tmt/plugins/__init__.py

@@ -293,14 +293,6 @@ def import_member(
     return (imported, getattr(imported, member))
 
 
-# Small helper for one specific package - export plugins are needed when
-# generating docs.
-def explore_export_package(logger: Logger) -> None:
-    """ Import all plugins bundled into tmt.export package """
-
-    _explore_package('tmt.export', _TMT_ROOT / 'export', logger.descend())
-
-
 RegisterableT = TypeVar('RegisterableT')