Enable SuiteSparse in Github workflows

Since SuiteSparse support became opt-in, the CI workflows still install
SuiteSparse but no longer enable it. As a result, the SuiteSparse
solvers and single precision CHOLMOD factorization were silently
excluded from all CI builds, even with a recent SuiteSparse release
available. Explicitly opt in wherever SuiteSparse is provided so that
these code paths are built and tested again.

Change-Id: Ia2eee0d68ec74e4b4404510ca81a524f03e0be07

.github/workflows/linux.yml

diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index dc3d8b4..2b75c9d 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -125,7 +125,8 @@
                 -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
                 -DCMAKE_C_COMPILER_LAUNCHER=$(which ccache) \
                 -DCMAKE_CXX_COMPILER_LAUNCHER=$(which ccache) \
-                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install \
+                -DWITH_SUITESPARSE=ON
 
       - name: Build
         run: |

.github/workflows/macos.yml

diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index eee89ff..bba4754 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -85,7 +85,8 @@
                 -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
                 -DCMAKE_C_COMPILER_LAUNCHER=$(which ccache) \
                 -DCMAKE_CXX_COMPILER_LAUNCHER=$(which ccache) \
-                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install
+                -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/install \
+                -DWITH_SUITESPARSE=ON
 
       - name: Build
         run: |

.github/workflows/windows.yml

diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 5a01158..6f4eb0f 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -60,6 +60,7 @@
               -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
               -DCMAKE_C_COMPILER_LAUNCHER:FILEPATH=ccache \
               -DCMAKE_CXX_COMPILER_LAUNCHER:FILEPATH=ccache \
+              -DWITH_SUITESPARSE=ON \
               -G Ninja
 
     - name: Build
@@ -191,7 +192,8 @@
                 -DBUILD_SHARED_LIBS=${{matrix.lib == 'shared'}} `
                 -DCMAKE_CONFIGURATION_TYPES=${{matrix.build_type}} `
                 -DCMAKE_INSTALL_PREFIX:PATH=${{github.workspace}}/install `
-                -DLAPACK_lapack_LIBRARY=${{github.workspace}}/suitesparse/lib/liblapack.lib
+                -DLAPACK_lapack_LIBRARY=${{github.workspace}}/suitesparse/lib/liblapack.lib `
+                -DWITH_SUITESPARSE=ON
 
       - name: Build
         run: |