Backport 6.1 | Use global.json in all pipeline jobs

[paulmedynski]

Description

Bakport of #3797:

• Added global.json to restrict our SDK to the single supported version, currently 9.0.309.

Testing

The CI pipelines will validate these changes.

[Copilot]

Pull request overview

This is a backport of PR #3797 to the 6.1 branch, standardizing how .NET SDK and Runtime installations are managed across all Azure Pipeline jobs using global.json.

Changes:

• Added global.json to restrict the SDK version to 9.0.309 with rollForward set to latestMinor
• Created new consolidated installation templates (install-dotnet.yml and install-dotnet-arm64.ps1) to replace the old ensure-dotnet-version.yml approach
• Updated all pipeline jobs to use the new installation templates, with special handling for ARM64 architecture
• Updated documentation and configuration files, though several version mismatches were introduced

Reviewed changes

Copilot reviewed 23 out of 23 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
global.json	Added SDK version specification (9.0.309) with rollForward and allowPrerelease settings
eng/pipelines/steps/install-dotnet.yml	New template for installing .NET SDK and Runtimes using global.json, with architecture-specific handling
eng/pipelines/steps/install-dotnet-arm64.ps1	New PowerShell script for ARM64 installation to work around UseDotNet@2 bug
eng/pipelines/steps/compound-build-akv-step.yml	Replaced ensure-dotnet-version with install-dotnet template, but introduced parameter indentation error
eng/pipelines/common/templates/steps/ensure-dotnet-version.yml	Removed old installation template (108 lines deleted)
eng/pipelines/common/templates/steps/pre-build-step.yml	Updated to use new install-dotnet template
eng/pipelines/common/templates/steps/ci-project-build-step.yml	Removed SDK installation (now handled by job templates)
eng/pipelines/common/templates/steps/ci-prebuild-step.yml	Removed SDK installation and project build step
eng/pipelines/common/templates/steps/prepare-test-db-step.yml	Changed default targetFramework to net10.0 (version mismatch with global.json)
eng/pipelines/common/templates/steps/build-all-configurations-signed-dlls-step.yml	Updated to use install-dotnet, but parameter name mismatch introduced
eng/pipelines/common/templates/jobs/ci-run-tests-job.yml	Added install-dotnet template, ARM64 support, and project build step with parameter issues
eng/pipelines/common/templates/jobs/ci-build-nugets-job.yml	Added install-dotnet template and Debug/Release build logic with parameter mismatches
eng/pipelines/common/templates/jobs/ci-code-coverage-job.yml	Updated to use install-dotnet template
eng/pipelines/common/templates/stages/ci-run-tests-stage.yml	Added isArm64 parameter propagation
eng/pipelines/jobs/stress-tests-ci-job.yml	Replaced multiple install tasks with single install-dotnet template call
eng/pipelines/stages/stress-tests-ci-stage.yml	Reduced default netFrameworkTestRuntimes to just net462
eng/pipelines/dotnet-sqlclient-ci-core.yml	Expanded test coverage for x86 builds, added ARM64 configuration with boolean/string type issue
BUILDGUIDE.md	Added .NET SDK requirements section, but mentions .NET 10.0 instead of 9.0
README.md	Reorganized documentation links alphabetically
.editorconfig	Fixed batch/cmd file pattern and added PowerShell to CRLF rule
.github/workflows/codeql.yml	Simplified to use global.json for SDK installation
.config/CredScanSuppressions.json	Formatting cleanup
src/Microsoft.Data.SqlClient.sln	Updated to reflect new install-dotnet files and removed ensure-dotnet-version

[Copilot]

Pull request overview

Copilot reviewed 22 out of 23 changed files in this pull request and generated 4 comments.

[paulmedynski]

Best to review one commit at a time, and ignore whitespace.