[PATCH 19/26] rv/rvgen: add abstract method stubs to Container class

The Container class extends RVGenerator but was missing implementations
for several abstract methods decorated with @not_implemented in the base
class. This could lead to NotImplementedError exceptions if code paths
attempt to call these methods on Container instances.

Add empty-string returning stub implementations for fill_tracepoint_handlers_skel,
fill_tracepoint_attach_probe, fill_tracepoint_detach_helper, and
fill_monitor_class_type. These empty returns are semantically correct
since Container is a grouping mechanism for organizing monitors, not an
actual monitor that generates tracepoint-specific C code.

Signed-off-by: Wander Lairson Costa <redacted>
---
 tools/verification/rvgen/rvgen/container.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/verification/rvgen/rvgen/container.py b/tools/verification/rvgen/rvgen/container.py
index 51f188530b4dd..65df21dfd17b2 100644
--- a/tools/verification/rvgen/rvgen/container.py
+++ b/tools/verification/rvgen/rvgen/container.py

@@ -30,3 +30,15 @@ class Container(generator.RVGenerator):
                              self._kconfig_marker(), container_marker)
             return result
         return result + container_marker
+
+    def fill_tracepoint_handlers_skel(self) -> str:
+        return ""
+
+    def fill_tracepoint_attach_probe(self) -> str:
+        return ""
+
+    def fill_tracepoint_detach_helper(self) -> str:
+        return ""
+
+    def fill_monitor_class_type(self) -> str:
+        return ""

-- 
2.52.0