[Python] add float to reserved word list (#16689)

* add float as reserved world

* clean up

* update samples

* Update modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPythonCodegen.java

Co-authored-by: Jonathan Ballet <jon@multani.info>

* update doc

* uncomment test

---------

Co-authored-by: Jonathan Ballet <jon@multani.info>

docs/generators/python-flask.md

@@ -78,10 +78,12 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>async</li>
 <li>auth_settings</li>
 <li>await</li>
+<li>base64</li>
 <li>body_params</li>
 <li>break</li>
 <li>class</li>
 <li>continue</li>
+<li>date</li>
 <li>def</li>
 <li>del</li>
 <li>elif</li>
@@ -90,6 +92,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>exec</li>
 <li>false</li>
 <li>finally</li>
+<li>float</li>
 <li>for</li>
 <li>form_params</li>
 <li>from</li>
@@ -99,6 +102,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>import</li>
 <li>in</li>
 <li>is</li>
+<li>json</li>
 <li>lambda</li>
 <li>local_var_files</li>
 <li>none</li>
@@ -113,6 +117,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>raise</li>
 <li>resource_path</li>
 <li>return</li>
+<li>schema</li>
 <li>self</li>
 <li>true</li>
 <li>try</li>