Fix polarion result dir filtering

Previous code assumed that the cifmw_polarion_jump_result_dir
points only to a result directory, meaning it contains only the
test results. However, cifmw_polarion_jump_result_dir may point
to a tempest location, meaning there are not only directories
with test results but also some other directories (etc/,
tempest_lock/ etc) that may be empty or not contain any
.xml files.

This commit changes the logic of finding the directories with
test results from a "give me all directories in this location"
to "let's derive the directories from the paths of found .xml
files". This way, we will filter only the directories that
contain at least one .xml file.

roles/polarion/tasks/main.yml

@@ -94,20 +94,13 @@
       ansible.builtin.debug:
         var: pylero_output.stdout_lines
 
-    - name: Look for test result directories in artifacts directory
-      ansible.builtin.find:
-        paths: "{{ cifmw_polarion_jump_result_dir }}"
-        recurse: false
-        file_type: directory
-      register: result_dirs
-
     - name: Merge result XML files of each directory
       ansible.builtin.shell:
         chdir: "{{ cifmw_polarion_jump_result_dir }}"
         cmd: >-
           source "{{ cifmw_polarion_jump_repo_dir }}/jump-venv/bin/activate" &&
-          junitparser merge {{ item.path }}/*.xml {{item.path }}/results_merged.xml
-      loop: "{{ result_dirs.files }}"
+          junitparser merge {{ item.path | dirname }}/*.xml {{item.path | dirname }}/results_merged.xml
+      loop: "{{ xml_files.files }}"
 
     - name: Look for test result XML files in artifacts directory
       ansible.builtin.find:
@@ -126,7 +119,7 @@
           --testrun-title={{ cifmw_polarion_testrun_title }}-{{ loop_idx }}
           --xml-file={{ item.path }}
           --update_testcases={{ cifmw_polarion_update_testcases | default(false) }}
-          --custom-fields cijoburl={{ cifmw_zuul_url }}/{{ zuul.build }},jobteststage={{ result_dirs.files[ loop_idx ].path | basename }}
+          --custom-fields cijoburl={{ cifmw_zuul_url }}/{{ zuul.build }},jobteststage={{ merged_xml_files.files[ loop_idx ].path | dirname | basename }}
           {{ cifmw_polarion_jump_extra_vars | default ('') }}
       loop: "{{ merged_xml_files.files }}"
       loop_control: