FindBinUtils: Revert "Use the compiler to get the path to compiler tools"

Revert commit b2fd479d (FindBinUtils: Use the compiler to get the path
to compiler tools, 2019-09-22, v3.16.0-rc1~51^2).  The compiler's answer
may incorrectly come from the `PATH`.  Another approach will be needed.

Fixes: #19934
Status Job ID Name Coverage
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