6533 update conda test config (#6535)

Fixes #6533

### Description
tested https://github.com/Project-MONAI/MONAI/actions/runs/5031522518
(windows tests not included -- took too long)

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Non-breaking change (fix or new feature that would not break
existing functionality).
- [ ] Breaking change (fix or new feature that would cause existing
functionality to change).
- [ ] New tests added to cover the changes.
- [ ] Integration tests passed locally by running `./runtests.sh -f -u
--net --coverage`.
- [ ] Quick tests passed locally by running `./runtests.sh --quick
--unittests --disttests`.
- [ ] In-line docstrings updated.
- [ ] Documentation updated, tested `make html` command in the `docs/`
folder.

---------

Signed-off-by: Wenqi Li <wenqil@nvidia.com>

Author: wyli

.github/workflows/conda.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9"]
+        python-version: ["3.9", "3.10"]
     runs-on: ${{ matrix.os }}
     env:
       QUICKTEST: True
@@ -36,24 +36,26 @@ jobs:
       with:
         auto-update-conda: true
         python-version: ${{ matrix.python-version }}
-    - name: Install env (CPU ${{ runner.os }})
-      shell: bash -l {0}
+        auto-activate-base: false
+        environment-file: environment-dev.yml
+        activate-environment: monai
+    - name: Env info (CPU ${{ runner.os }})
+      shell: bash -el {0}
       run: |
         conda info
         conda list
-        conda env create --file environment-dev.yml
     - if: runner.os == 'windows'
       name: Windows only install
-      shell: bash -l {0}
+      shell: bash -el {0}
       run: |
         conda activate monai
         # this `cpuonly` and -c conda-forge is needed to reduce the paging file size on a github instance
         # force to install `cpuonly==2.0.0` is to fix the same issue as:
         # https://github.com/pytorch/vision/issues/4240
         conda install pytorch torchvision torchaudio cpuonly==2.0.0 -c pytorch -c conda-forge
         conda deactivate
-    - name: Test env(CPU ${{ runner.os }})
-      shell: bash -l {0}
+    - name: Test env (CPU ${{ runner.os }})
+      shell: bash -el {0}
       run: |
         conda activate monai
         $(pwd)/runtests.sh --build --unittests