add CI for test_partition_functions

.github/workflows/test_partition_functions.yml

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+name: test_partition_functions
+
+on: [pull_request]
+jobs:
+  test_partition_functions:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get AMReX
+        run: |
+          mkdir external
+          cd external
+          git clone https://github.com/AMReX-Codes/amrex.git
+          cd amrex
+          git checkout development
+          echo 'AMREX_HOME=$(GITHUB_WORKSPACE)/external/amrex' >> $GITHUB_ENV
+          echo $AMREX_HOME
+          if [[ -n "${AMREX_HOME}" ]]; then exit 1; fi
+          cd ../..
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -y -qq
+          sudo apt-get -qq -y install curl cmake jq clang g++>=9.3.0
+
+      - name: Compile
+        run: |
+          cd unit_test/test_part_func
+          make clean
+          make -j 4
+
+      - name: Run test_part_func
+        run: |
+          cd unit_test/test_part_func
+          ./main3d.gnu.ex > test.out
+
+      - name: Compare to stored output
+        run: |
+          cd unit_test/test_part_func
+          diff -I "^Initializing AMReX" -I "^AMReX" -I "^reading in reaclib rates" test.out ci-benchmarks/part_func.out
+

unit_test/test_part_func/ci-benchmarks/part_func.out

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+Initializing AMReX (24.10-20-gb9d549bcf4a6)...
+AMReX (24.10-20-gb9d549bcf4a6) initialized
+starting the single zone burn...
+reading in network electron-capture / beta-decay tables...
+temperature = 5000000000
+Ni56: 1.010868 2.337172328e-11
+Fe52: 1.743116 3.226066771e-10
+spins: 2 1 1 8 1
+AMReX (24.10-20-gb9d549bcf4a6) finalized