[clang] Add support for -fcx-limited-range, #pragma CX_LIMITED_RANGE and...

[clang] Add support for -fcx-limited-range, #pragma CX_LIMITED_RANGE and -fcx-fortran-rules.  (#70244)

This patch adds the #pragma CX_LIMITED_RANGE defined in the C
specification.
It also adds the options -f[no]cx-limited-range and
-f[no]cx-fortran-rules.
-fcx-limited-range enables algebraic formulas for complex multiplication
and division. This option is enabled with -ffast-math.
-fcx-fortran-rules enables algebraic formulas for complex multiplication
and enables Smith’s algorithm for complex division (SMITH, R. L.
Algorithm 116: Complex division. Commun. ACM 5, 8 (1962)).

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Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
Co-authored-by: Joseph Huber <jhuber6@vols.utk.edu>
Co-authored-by: Guray Ozen <guray.ozen@gmail.com>
Co-authored-by: Nishant Patel <nishant.b.patel@intel.com>
Co-authored-by: Jessica Clarke <jrtc27@jrtc27.com>
Co-authored-by: Petr Hosek <phosek@google.com>
Co-authored-by: Joseph Huber <35342157+jhuber6@users.noreply.github.com>
Co-authored-by: Craig...