Fix HiGHS on 32-bit

[odow]

We probably need something like this in the next JLL build:

diff --git a/H/HiGHS/build_tarballs.jl b/H/HiGHS/build_tarballs.jl
index d09863025..4cd841c82 100644
--- a/H/HiGHS/build_tarballs.jl
+++ b/H/HiGHS/build_tarballs.jl
@@ -34,11 +34,21 @@ else
     LBT=blastrampoline
 fi
 
+# Needed because of
+# https://github.com/ERGO-Code/HiGHS/issues/769#issuecomment-2466938187
+if [[ "${target}" == i686-linux-gnu ]]; then
+    C_FLAGS="-ffloat-store"
+else
+    C_FLAGS=""
+fi
+
 cmake -DCMAKE_INSTALL_PREFIX=${prefix} \
     -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} \
     -DCMAKE_BUILD_TYPE=Release \
     -DBUILD_SHARED_LIBS=ON \
     -DBUILD_TESTING=OFF \
+    -DCMAKE_C_FLAGS="${C_FLAGS}" \
+    -DCMAKE_CXX_FLAGS="${C_FLAGS}" \
     -DHIPO=ON \
     -DBLA_VENDOR=blastrampoline \
     -DBLAS_LIBRARIES=\"${LBT}\" \

Then we can remove

HiGHS.jl/.github/workflows/ci.yml

Lines 25 to 33 in ac47dfd

	# HiGHS segfaults on 32-bit.
	# Upstream is https://github.com/ERGO-Code/HiGHS/issues/769
	# but we decided investigating was a low priority until it
	# impacts users.
	# include:
	# # Also test against 32-bit Linux.
	# - version: '1'
	# os: ubuntu-latest
	# arch: x86