Allow specifying the output encoding in the template module (#42171)

Allow specifying the source and destination files' encodings in the template module

* Added output_encoding to the template module, default to utf-8
* Added documentation for the new variables
* Leveraged the encoding argument on to_text() and to_bytes() to keep the implementation as simple as possible
* Added integration tests with files in utf-8 and windows-1252 encodings, testing all combinations
* fix bad smell test by excluding windows-1252 files from the utf8 checks
* fix bad smell test by excluding valid files from the smart quote test

test/integration/targets/template/files/encoding_1252_utf-8.expected

@@ -0,0 +1 @@
+windows-1252 Special Characters: €‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ

test/integration/targets/template/files/encoding_1252_windows-1252.expected

@@ -0,0 +1 @@
+windows-1252 Special Characters: <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

test/integration/targets/template/tasks/main.yml

@@ -619,5 +619,28 @@
       - 'template_results.mode == "0547"'
       - 'stat_results.stat["mode"] == "0547"'
 
+# Test output_encoding
+- name: Prepare the list of encodings we want to check, including empty string for defaults
+  set_fact:
+    template_encoding_1252_encodings: ['', 'utf-8', 'windows-1252']
+
+- name: Copy known good encoding_1252_*.expected into place
+  copy:
+    src: 'encoding_1252_{{ item | default("utf-8", true) }}.expected'
+    dest: '{{ output_dir }}/encoding_1252_{{ item }}.expected'
+  loop: '{{ template_encoding_1252_encodings }}'
+
+- name: Generate the encoding_1252_* files from templates using various encoding combinations
+  template:
+    src: 'encoding_1252.j2'
+    dest: '{{ output_dir }}/encoding_1252_{{ item }}.txt'
+    output_encoding: '{{ item }}'
+  loop: '{{ template_encoding_1252_encodings }}'
+
+- name: Compare the encoding_1252_* templated files to known good
+  command: diff -u {{ output_dir }}/encoding_1252_{{ item }}.expected {{ output_dir }}/encoding_1252_{{ item }}.txt
+  register: encoding_1252_diff_result
+  loop: '{{ template_encoding_1252_encodings }}'
+
 # aliases file requires root for template tests so this should be safe
 - include: backup_test.yml

test/integration/targets/template/templates/encoding_1252.j2

@@ -0,0 +1 @@
+windows-1252 Special Characters: €‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ