[FIX] base: SCSS don't compile Bootstrap 5

- Fixes the RegEx that insert our internal structure path
for some assets like image font...
BS5 uses inline SVG and the function `escape-svg` to escape some
characters in HTML. But we can't add the path as the image is inline.

- Don't include Bootstrap in LESS assets;
Since Bootstrap 4 (and also in 5) there are no more LESS files for
Bootstrap. So, there is no reason to include the path when we compile
LESS assets.

Task ID: 2766483

Part-of: odoo/odoo#95450

odoo/addons/base/models/assetsbundle.py

@@ -876,7 +876,7 @@ class JavascriptAsset(WebAsset):
 
 class StylesheetAsset(WebAsset):
     rx_import = re.compile(r"""@import\s+('|")(?!'|"|/|https?://)""", re.U)
-    rx_url = re.compile(r"""url\s*\(\s*('|"|)(?!'|"|/|https?://|data:)""", re.U)
+    rx_url = re.compile(r"""(?<!")url\s*\(\s*('|"|)(?!'|"|/|https?://|data:|#{str)""", re.U)
     rx_sourceMap = re.compile(r'(/\*# sourceMappingURL=.*)', re.U)
     rx_charset = re.compile(r'(@charset "[^"]+";)', re.U)
 
@@ -1062,5 +1062,4 @@ class LessStylesheetAsset(PreprocessedCSS):
                 lessc = misc.find_in_path('lessc')
         except IOError:
             lessc = 'lessc'
-        lesspath = get_resource_path('web', 'static', 'lib', 'bootstrap', 'less')
-        return [lessc, '-', '--no-js', '--no-color', '--include-path=%s' % lesspath]
+        return [lessc, '-', '--no-js', '--no-color']