Merged PR 470: Updated azure-benchmark-pipeline.yaml to use 'Imaginary Yak Pool'

## Summary
Updated azure-benchmark-pipeline.yaml to use 'Imaginary Yak Pool'

## Test process
Manually tested that it runs end-to-end

## Checklist
- [ ] PR is linked to a **work item**
- [ ] **acceptance criteria** of linked ticket are met
- [ ] performed **self-review** of the code
- [ ] written **tests** for any new functionality added with this PR
- [ ] updated the **documentation** if this PR changes or adds functionality
- [ ] written/updated **design docs** if this PR implements new functionality
- [ ] updated the **change log**
- [ ] ran **pre-commit** checks for code style
- [ ] attended to any **TO-DOs** left in the code

Related work items: #2758

.azure/azure-benchmark-pipeline.yaml

@@ -19,13 +19,18 @@ jobs:
 - job: PrimAITE_Benchmark
   timeoutInMinutes: 360 # 6-hour maximum
   pool:
-    vmImage: ubuntu-latest
+    name: 'Imaginary Yak Pool'
   workspace:
     clean: all
+
   steps:
   - checkout: self
     persistCredentials: true
 
+  - script: |
+      python3.10 -m venv venv
+    displayName: 'Create venv'
+
   - script: |
       VERSION=$(cat src/primaite/VERSION | tr -d '\n')
       if [[ "$(Build.SourceBranch)" == "refs/heads/dev" ]]; then
@@ -41,21 +46,18 @@ jobs:
       echo "##vso[task.setvariable variable=MAJOR_VERSION]$MAJOR_VERSION"
     displayName: 'Set Version Variables'
 
-  - task: UsePythonVersion@0
-    inputs:
-      versionSpec: '3.11'
-      addToPath: true
-
   - script: |
-      python -m pip install --upgrade pip
+      source venv/bin/activate
+      pip install --upgrade pip
       pip install -e .[dev,rl]
       primaite setup
     displayName: 'Install Dependencies'
 
   - script: |
       set -e
+      source venv/bin/activate
       cd benchmark
-      python3 primaite_benchmark.py
+      python primaite_benchmark.py
       cd ..
     displayName: 'Run Benchmarking Script'