Fixing the UHF hamiltonian generation (#309)

In this PR:
1- We allowed the calculation for the spin molecular Hamiltonian for
both full and active space using UHF
2- We fixed the electron integrals calculation for the active space
Hamiltonian when using the UHF molecular orbitals.

---------

Signed-off-by: marwafar <[email protected]>
Signed-off-by: Ben Howe <[email protected]>
Co-authored-by: Ben Howe <[email protected]>
Co-authored-by: Ben Howe <[email protected]>

Author: marwafar

.github/workflows/pr_sanity_checks.yaml

@@ -16,7 +16,7 @@ env:
 jobs:
   check-changes:
     name: Check changes
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     outputs:
       check-cpp: ${{ steps.filter.outputs.check-cpp }}
       check-all-cpp: ${{ steps.filter.outputs.check-all-cpp }}
@@ -127,15 +127,15 @@ jobs:
     name: Check Python code formatting
     needs: [check-changes]
     if: needs.check-changes.outputs.check-python == 'true' || needs.check-changes.outputs.check-all-python == 'true'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
           set-safe-directory: true
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'