Switch CI to GitHub-hosted runners and exclude live PLC tests

Self-hosted runners are no longer available; both the test and
publish pipelines now run on ubuntu-latest. No step relied on
ARM64-specific behavior, so this is a drop-in swap. Also explicitly
filter out TestLivePLC in the test pipeline since live PLC hardware
access is no longer available (those tests were already Skip-attributed
in source, this makes the exclusion explicit at the CI level too).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: Sandoun

.github/workflows/publish-pipeline.yml

@@ -27,7 +27,7 @@ jobs:
   publish-package:
     name: 'Build and publish package'
     needs: test-pipeline
-    runs-on: [self-hosted, linux, ARM64]
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - name: 'RenameVersionTag'

.github/workflows/test-pipeline.yml

@@ -20,7 +20,7 @@ jobs:
   #Run unit tests on the test PLCs
   run-unit-tests:
     name: 'Run tests and documentation'
-    runs-on: self-hosted
+    runs-on: ubuntu-latest
     steps:
 
       - name: 'Setup dotnet'
@@ -39,7 +39,7 @@ jobs:
         id: extract_branch
 
       - name: 'Run tests'
-        run: dotnet test "./MewtocolTests" /p:CollectCoverage=true /p:CoverletOutputFormat=opencover /p:CoverletOutput=../Builds/TestResults/coverage.opencover.xml
+        run: dotnet test "./MewtocolTests" --filter "FullyQualifiedName!~TestLivePLC" /p:CollectCoverage=true /p:CoverletOutputFormat=opencover /p:CoverletOutput=../Builds/TestResults/coverage.opencover.xml
 
       - name: 'Run docbuilder'
         continue-on-error: true