Merge pull request #3298 from stan-dev/update/opencl

Update OpenCL headers to v2025.07.22

Author: WardBrian

doxygen/doxygen.cfg

@@ -2295,7 +2295,7 @@ INCLUDE_PATH           = ./ \
                          lib/eigen_3.4.0 \
                          lib/sundials_6.1.1/include \
                          lib/sundials_6.1.1/src/sundials \
-                         lib/opencl_3.0.0 \
+                         lib/opencl_v2025.07.22 \
                          lib/benchmark_1.5.1/googletest/googletest/include \
                          lib/benchmark_1.5.1/googletest/googletest