OCL: Disabled minMaxIdx for 32FC1

**WIP** Set `test_loop_times` to 10 for additional check.

Disabled minMaxIdx for 32FC1 since it occasionally fails on AMD devices (e.g. A10-6800K)

check_regression=OCL*MinMax*:OCL*Norm*
test_filter=OCL*MinMax*:OCL*Norm*
build_examples=OFF
test_modules=core