[libc][[math] Implement Classification Macros

[Sh0g0-1758]

Refer section 7.12.3 of the ISO spec. We still have some unimplemented math function macros. The following are to be implemented :

• fpclassify [libc][math] Implement fpclassify macro. #109519
• iscanonical [libc][math] Implement issignaling and iscanonical macro. #111403
• isnormal [libc][math] Implement isnormal macro. #109547
• issignaling [libc][math] Implement issignaling macro. #109615 [libc][math] Implement issignaling and iscanonical macro. #111403
• issubnormal [libc][math] Implement issubnormal macro. #109572
• iszero [libc][[math] Implement IsZero Macro #109336

cc : @lntue

[Sh0g0-1758]

Kindly assign the issue to me, @lntue