[libc][math] Refactor floor Math Functions to Header Only

[hulxv]

This is tracking issue to refactor floor math functions currently implemented in LLVM libc to be header-only.

part of: #147386

Target Functions:

• floor
• floorbf16
• floorf
• floorf128
• floorf16
• floorl

CC: @bassiounix

[llvmbot]

@llvm/issue-subscribers-libc

Author: Mohamed Emad (hulxv)

Details

This is tracking issue to refactor floor math functions currently implemented in LLVM libc to be header-only.

part of: #147386

Target Functions:

• floor
• floorbf16
• floorf
• floorf128
• floorf16
• floorl

CC: @bassiounix