math: argument reduction inaccurate on s390x for huge inputs for Sin/Cos/SinCos/Tan

[griesemer]

Currently, tests for huge arguments for Sin/Cos/SinCos/Tan are disabled for s390x because the respective assembly routines don't reduce input arguments accurately enough.

The assembly routines are fixed; or better, the pure Go code should be used instead if there's no significant performance difference.

See also #29221 for more details.

[gopherbot]

Change https://go.dev/cl/469635 mentions this issue: math: huge argument handling for sin/cos in s390x

[gopherbot]

Change https://go.dev/cl/509675 mentions this issue: math: enable huge argument tests on s390x