[FIX] core: ignore invalid escape sequence in 3.10

Since Python 3.10, the invalid escape sequence warning use quotes to
display the invalid sequence. Because of that, the filter does not catch
it anymore.

With this commit, they are caught in all supported versions.

Part-of: odoo/odoo#98081

odoo/netsvc.py

@@ -127,7 +127,7 @@ def init_logger():
     warnings.filterwarnings('default', category=DeprecationWarning)
     # ignore deprecation warnings from invalid escape (there's a ton and it's
     # pretty likely a super low-value signal)
-    warnings.filterwarnings('ignore', r'^invalid escape sequence \\.', category=DeprecationWarning)
+    warnings.filterwarnings('ignore', r'^invalid escape sequence \'?\\.', category=DeprecationWarning)
     # recordsets are both sequence and set so trigger warning despite no issue
     warnings.filterwarnings('ignore', r'^Sampling from a set', category=DeprecationWarning, module='odoo')
     # ignore a bunch of warnings we can't really fix ourselves