[libc] [llvm] [libc][math] Refactor exp implementation to header-only in src/__support/math folder. (PR #148761)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp,h -- libc/shared/math/exp.h libc/src/__support/math/exp.h libc/src/__support/math/exp_constants.h libc/src/__support/math/exp_utils.h libc/shared/math.h libc/src/math/generic/common_constants.cpp libc/src/math/generic/common_constants.h libc/src/math/generic/exp.cpp libc/src/math/generic/explogxf.h
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View the diff from clang-format here.
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``````````diff
diff --git a/libc/src/__support/math/exp.h b/libc/src/__support/math/exp.h
index 5c8ea0896..a538df1e8 100644
--- a/libc/src/__support/math/exp.h
+++ b/libc/src/__support/math/exp.h
@@ -161,7 +161,7 @@ static Float128 exp_f128(double x, double kd, int idx1, int idx2) {
 
 // Compute exp(x) with double-double precision.
 static DoubleDouble exp_double_double(double x, double kd,
-                                                const DoubleDouble &exp_mid) {
+                                      const DoubleDouble &exp_mid) {
   // Recalculate dx:
   //   dx = x - k * 2^-12 * log(2)
   double t1 = fputil::multiply_add(kd, MLOG_2_EXP2_M12_HI, x); // exact

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https://github.com/llvm/llvm-project/pull/148761