Remove Python 3.10 from CI build workflow matrix

Agent-Logs-Url: https://github.com/MPAS-Dev/MPAS-Tools/sessions/0b1b89b1-5eb6-412d-b489-bb2b044bca33

Co-authored-by: xylar <4179064+xylar@users.noreply.github.com>

Author: Copilot

.github/workflows/build_workflow.yml

@@ -62,7 +62,7 @@ jobs:
         shell: bash -l {0}
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.11", "3.12", "3.13", "3.14"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v6