[python][client] allow passing floats for _request_timeout (#9532)

* [python][client] allow passing floats for _request_timeout

While several method docstrings suggested that you could pass floats for
_request_timeout and the underlying urllib3.Timeout can deal with them,
the code only allowed integer values so far when passed as a single
number.

* [python][samples] update with fix for _request_timeout type

Author: daniel-k

.generator/templates/api.mustache

@@ -80,8 +80,8 @@ class {{classname}}(object):
                 _preload_content (bool): if False, the urllib3.HTTPResponse object
                     will be returned without reading/decoding response data.
                     Default is True.
-                _request_timeout (float/tuple): timeout setting for this request. If one
-                    number provided, it will be total request timeout. It can also
+                _request_timeout (int/float/tuple): timeout setting for this request. If
+                    one number provided, it will be total request timeout. It can also
                     be a pair (tuple) of (connection, read) timeouts.
                     Default is None.
                 _check_input_type (bool): specifies if type checking

.generator/templates/api_client.mustache

@@ -127,7 +127,7 @@ class ApiClient(object):
         _return_http_data_only: typing.Optional[bool] = None,
         collection_formats: typing.Optional[typing.Dict[str, str]] = None,
         _preload_content: bool = True,
-        _request_timeout: typing.Optional[typing.Union[int, typing.Tuple]] = None,
+        _request_timeout: typing.Optional[typing.Union[int, float, typing.Tuple]] = None,
         _host: typing.Optional[str] = None,
         _check_type: typing.Optional[bool] = None
     ):
@@ -359,7 +359,7 @@ class ApiClient(object):
         _return_http_data_only: typing.Optional[bool] = None,
         collection_formats: typing.Optional[typing.Dict[str, str]] = None,
         _preload_content: bool = True,
-        _request_timeout: typing.Optional[typing.Union[int, typing.Tuple]] = None,
+        _request_timeout: typing.Optional[typing.Union[int, float, typing.Tuple]] = None,
         _host: typing.Optional[str] = None,
         _check_type: typing.Optional[bool] = None
     ):
@@ -695,7 +695,7 @@ class Endpoint(object):
             'async_req': (bool,),
             '_host_index': (none_type, int),
             '_preload_content': (bool,),
-            '_request_timeout': (none_type, int, (int,), [int]),
+            '_request_timeout': (none_type, float, (float,), [float], int, (int,), [int]),
             '_return_http_data_only': (bool,),
             '_check_input_type': (bool,),
             '_check_return_type': (bool,)