Add el9toel10 actor to handle symlink -> directory with ruby IRB.

The `/usr/share/ruby/irb` path is a symlink in RHEL 9,
but a regular directory in RHEL 10.

Simply remove the symlink to then let the RPM mechanism create the
correct directory on update.

Users should not expect to ever retain anything in this directory.

repos/system_upgrade/el9toel10/actors/registerrubyirbadjustment/actor.py

@@ -0,0 +1,22 @@
+from leapp.actors import Actor
+from leapp.models import DNFWorkaround
+from leapp.tags import FactsPhaseTag, IPUWorkflowTag
+
+
+class RegisterRubyIRBAdjustment(Actor):
+    """
+    Registers a workaround which will adjust the Ruby IRB directories during the upgrade.
+    """
+
+    name = 'register_ruby_irb_adjustment'
+    consumes = ()
+    produces = (DNFWorkaround,)
+    tags = (IPUWorkflowTag, FactsPhaseTag)
+
+    def process(self):
+        self.produce(
+            DNFWorkaround(
+                display_name='IRB directory fix',
+                script_path=self.get_tool_path('handlerubyirbsymlink'),
+            )
+        )

repos/system_upgrade/el9toel10/actors/registerrubyirbadjustment/tests/test_register_ruby_irb_adjustments.py

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+import os.path
+
+from leapp.models import DNFWorkaround
+
+
+def test_register_ruby_irb_adjustments(current_actor_context):
+    current_actor_context.run()
+    assert len(current_actor_context.consume(DNFWorkaround)) == 1
+    assert current_actor_context.consume(DNFWorkaround)[0].display_name == 'IRB directory fix'
+    assert os.path.basename(current_actor_context.consume(DNFWorkaround)[0].script_path) == 'handlerubyirbsymlink'
+    assert os.path.exists(current_actor_context.consume(DNFWorkaround)[0].script_path)

repos/system_upgrade/el9toel10/tools/handlerubyirbsymlink

@@ -0,0 +1,22 @@
+#!/usr/bin/bash -e
+
+# just in case of hidden files.. not sure why would someone do that, it's more
+# like forgotten cache file possibility, but rather do that..
+shopt -s dotglob
+
+handle_dir() {
+    # Check that $1 is a symlink then unlink it so that RPM
+    # can freely create the directory.
+    if [ ! -L "$1" ]; then
+        return
+    fi
+
+    # There is no configuration or anything that the user should ever customize
+    # and expect to retain.
+    unlink "$1"
+
+    return 0
+}
+
+
+handle_dir /usr/share/ruby/irb