Fix Cython type declaration warnings at lines 1119, 1121, 1125

Remove quotes from Optional[int] and Optional[float] type annotations
that were causing Cython warnings. These annotations are now unquoted
since TYPE_CHECKING protects the imports.

Co-authored-by: letmaik <530988+letmaik@users.noreply.github.com>

Author: Copilot

rawpy/_rawpy.pyx

@@ -1114,15 +1114,15 @@ class Params(object):
                  user_wb: 'Optional[List[float]]' = None,
                  output_color: 'ColorSpace' = ColorSpace.sRGB, 
                  output_bps: int = 8, 
-                 user_flip: 'Optional[int]' = None, 
-                 user_black: 'Optional[int]' = None, 
-                 user_sat: 'Optional[int]' = None,
+                 user_flip: Optional[int] = None, 
+                 user_black: Optional[int] = None, 
+                 user_sat: Optional[int] = None,
                  no_auto_bright: bool = False, 
-                 auto_bright_thr: 'Optional[float]' = None, 
+                 auto_bright_thr: Optional[float] = None, 
                  adjust_maximum_thr: float = 0.75,
                  bright: float = 1.0, 
                  highlight_mode: 'Union[HighlightMode, int]' = HighlightMode.Clip,
-                 exp_shift: 'Optional[float]' = None, 
+                 exp_shift: Optional[float] = None, 
                  exp_preserve_highlights: float = 0.0, 
                  no_auto_scale: bool = False,
                  gamma: 'Optional[Tuple[float, float]]' = None,