[llvm] Revert "[APInt] Remove multiplicativeInverse with explicit modulus (#… (PR #87812)

[Jay Foad via llvm-commits]

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@@ -3249,11 +3249,22 @@ TEST(APIntTest, SolveQuadraticEquationWrap) {
 }
 
 TEST(APIntTest, MultiplicativeInverseExaustive) {
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jayfoad wrote:

This is nowhere near "exhaustive" since it only tests one (power of two) modulus per BitWidth.

https://github.com/llvm/llvm-project/pull/87812