CI: 32 GB machine for Ollama tests (#1857)

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## Description
Recently the Llama test became failing with `model requires more system
memory (8.9 GiB) than is available (8.4 GiB)`. Due to `cgroup`
configuration, only 8 GBs are available for containers running on
`buildjet-4vcpu-ubuntu-2204`.
The decision is to change the the machine to
`buildjet-8vcpu-ubuntu-2204`. it costs 0.0016 $ per minute.

Unconfidently changed the model to `phi3:mini`. Any other ideas are
welcome.
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- [ ] Bug fix (non-breaking change that fixes an issue)
- [ ] New feature (non-breaking change that adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
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- [ ] Documentation update
- [ ] Code refactoring
- [ ] Performance improvement
- [x] Other (please specify):

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## Pre-submission Checklist
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- [ ] **I have tested my changes thoroughly before submitting this PR**
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.github/workflows/test_ollama.yml

@@ -7,13 +7,8 @@ jobs:
 
   run_ollama_test:
 
-    # needs 16 Gb RAM for phi4
+    # needs 32 Gb RAM for phi4 in a container
-    runs-on: buildjet-4vcpu-ubuntu-2204
+    runs-on: buildjet-8vcpu-ubuntu-2204
-#    services:
-#      ollama:
-#        image: ollama/ollama
-#        ports:
-#          - 11434:11434
 
     steps:
       - name: Checkout repository
@@ -28,14 +23,6 @@ jobs:
         run: |
           uv add torch
 
-#      - name: Install ollama
-#        run: curl -fsSL https://ollama.com/install.sh | sh
-#      - name: Run ollama
-#        run: |
-#          ollama serve --openai &
-#          ollama pull llama3.2 &
-#          ollama pull avr/sfr-embedding-mistral:latest
-
       - name: Start Ollama container
         run: |
           docker run -d --name ollama -p 11434:11434 ollama/ollama