Merge pull request #11304 from kinchungwong:issue_11242_intrin_cv34x_nocpp11

* Issue 11242 intrinsics v_extract, v_rotate improvement, branch 3.4, without C++11 (remove type restrictions for SSE2, use PALIGNR on SSSE3, compile to no-op when imm is 0 or nlanes).

* fix whitespace

* Fix #11242 (NEON intrinsics v_rotate...) branch 3.4
Separate macro expansion OPENCV_HAL_IMPL_NEON_SHIFT_OP for bitwise shifts for integers, from macro expansion OPENCV_HAL_IMPL_NEON_ROTATE for lane rotations. Bitwise shifts do not apply to floats, but lane-rotations can apply to both.

* fix whitespace

* Fix #11242 compile error (VSX intrinsics v_rotate(a)) branch 3.4 no-c++11

modules/core/test/test_intrin.cpp

@@ -215,6 +215,8 @@ TEST(hal_intrin, float32x4) {
         .test_matmul()
         .test_transpose()
         .test_reduce_sum4()
+        .test_extract<0>().test_extract<1>().test_extract<2>().test_extract<3>()
+        .test_rotate<0>().test_rotate<1>().test_rotate<2>().test_rotate<3>()
         ;
 }
 
@@ -233,6 +235,8 @@ TEST(hal_intrin, float64x2) {
         .test_unpack()
         .test_float_math()
         .test_float_cvt32()
+        .test_extract<0>().test_extract<1>()
+        .test_rotate<0>().test_rotate<1>()
         ;
 }
 #endif