Revert "Merge pull request #28557 from obsidiansystems/binutils-wrapper"

This reverts commit 0a944b34, reversing
changes made to 61733ed6.

I dislike these massive stdenv changes with unclear motivation,
especially when they involve gratuitous mass renames like NIX_CC ->
NIX_BINUTILS. The previous such rename (NIX_GCC -> NIX_CC) caused
months of pain, so let's not do that again.