Merge pull request #27182 from CodeLinaro:boxFilter_hal_changes

Parallel_for in box Filter and support for 32f box filter in Fastcv hal #27182

Added parallel_for in box filter hal and support for 32f box filter

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [ ] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/imgproc/perf/perf_blur.cpp

@@ -104,7 +104,7 @@ PERF_TEST_P(Size_MatType_BorderType, blur16x16,
     Size size = get<0>(GetParam());
     int type = get<1>(GetParam());
     BorderType btype = get<2>(GetParam());
-    double eps = 1e-3;
+    double eps = 1.25e-3;
 
     eps = CV_MAT_DEPTH(type) <= CV_32S ? 1 : eps;