Update CI to test on 3.10

As part of LangChain 1.0, Python 3.9 is being dropped. This commit
updates the CI so that azure langchain packages that update to drop
3.9 as well will be testing under the correct Python version lower
bound (instead of GitHub possibly falling back to a different Python
version that is available in the environment).

Author: kyleknap

.github/workflows/_compile_integration_test.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.12"
     name: "poetry run pytest -m compile tests/integration_tests #${{ matrix.python-version }}"
     steps:

.github/workflows/_lint.yml

@@ -29,7 +29,7 @@ jobs:
         # Starting new jobs is also relatively slow,
         # so linting on fewer versions makes CI faster.
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.12"
     steps:
       - uses: actions/checkout@v4

.github/workflows/_test.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.12"
     name: "make test #${{ matrix.python-version }}"
     steps: