[IMP] conf.py, requirements.txt, *: allow building with Python 3.10

- Bump Sphinx version to 4.3.2 (default for Debian Jammy).
- Remove the retrocompatibility for Sphinx < 3.5 (warnings are raised in
  4.5).
- Fix translator issue crashing builds.
- Unpin jinja2 from the requirements as the base issue is solved in sphinx 4

Task - 2898477

closes odoo/documentation#2361

Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

conf.py

@@ -201,8 +201,8 @@ html_favicon = os.path.join(html_theme_path[0], html_theme, 'static', 'img', 'fa
 # They are copied after the builtin static files, so a file named "default.css" will overwrite the
 # builtin "default.css".
 html_static_path = ['static']
-html_add_permalinks = '¶'  # Sphinx < 3.5
-html_permalinks = True  # Sphinx >= 3.5
+html_permalinks = True
+
 # Additional JS & CSS files that can be imported with the 'custom-js' and 'custom-css' metadata.
 # Lists are empty because the files are specified in extensions/themes.
 html_js_files = []

extensions/odoo_theme/translator.py

@@ -1,13 +1,9 @@
 # -*- coding: utf-8 -*-
-import os.path
-import posixpath
-import re
 
 from docutils import nodes
-from sphinx import addnodes, util, builders
 from sphinx.locale import admonitionlabels
 from sphinx.writers.html5 import HTML5Translator
-#from urllib.request import url2pathname
+
 
 # Translators inheritance chain:
 # Docutils Base HTML translator: https://sourceforge.net/p/docutils/code/HEAD/tree/trunk/docutils/docutils/writers/_html_base.py
@@ -56,7 +52,6 @@ class BootstrapTranslator(HTML5Translator):
     html_title = 'html_title'
     html_subtitle = 'html_subtitle'
 
-
     def __init__(self, builder, *args, **kwds):
         super().__init__(builder, *args, **kwds)
 
@@ -150,7 +145,8 @@ class BootstrapTranslator(HTML5Translator):
         # type: (nodes.Node) -> None
         self.generate_targets_for_table(node)
 
-        self._table_row_index = 0
+        # c/p of https://github.com/pydata/pydata-sphinx-theme/pull/509/files
+        self._table_row_indices.append(0)
 
         classes = [cls.strip(u' \t\n')
                    for cls in self.settings.table_style.split(',')]

requirements.txt

@@ -1,8 +1,6 @@
 docutils==0.16.0  # Compatibility with sphinx-tabs 3.2.0.
-jinja2<3.1  # Compatibility with Sphinx 3.5.4.
 pygments~=2.6.1
 pygments-csv-lexer~=0.1
 pysass~=0.1.0
-sphinx~=3.0
+sphinx==4.3.2
 sphinx-tabs==3.2.0
-werkzeug==0.14.1