Rework MSTest docs to be feature oriented

[Evangelink]

Summary

Follow-up changes from #50979 (comment)

Fixes microsoft/testfx#5659

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📄 File	🔗 Preview link
docs/core/project-sdk/msbuild-props.md	MSBuild reference for .NET SDK projects
docs/core/testing/index.md	Testing in .NET
docs/core/testing/microsoft-testing-platform-intro.md	Microsoft.Testing.Platform overview
docs/core/testing/mstest-analyzers/design-rules.md	docs/core/testing/mstest-analyzers/design-rules
docs/core/testing/mstest-analyzers/mstest0001.md	MSTEST0001: Explicitly enable or disable tests parallelization
docs/core/testing/mstest-analyzers/overview.md	MSTest code analysis
docs/core/testing/mstest-analyzers/usage-rules.md	MSTest usage rules
docs/core/testing/unit-testing-csharp-with-mstest.md	Get started with C# and MSTest
docs/core/testing/unit-testing-fsharp-with-mstest.md	docs/core/testing/unit-testing-fsharp-with-mstest
docs/core/testing/unit-testing-mstest-getting-started.md	Get started with MSTest
docs/core/testing/unit-testing-mstest-intro.md	MSTest overview
docs/core/testing/unit-testing-mstest-running-tests.md	Run tests with MSTest
docs/core/testing/unit-testing-mstest-sdk.md	MSTest SDK configuration
docs/core/testing/unit-testing-mstest-writing-tests-assertions.md	MSTest assertions
docs/core/testing/unit-testing-mstest-writing-tests-controlling-execution.md	Test execution and control in MSTest
docs/core/testing/unit-testing-mstest-writing-tests-data-driven.md	docs/core/testing/unit-testing-mstest-writing-tests-data-driven
docs/core/testing/unit-testing-mstest-writing-tests-lifecycle.md	MSTest lifecycle
docs/core/testing/unit-testing-mstest-writing-tests-organizing.md	Run only integration tests
docs/core/testing/unit-testing-mstest-writing-tests-testcontext.md	MSTest TestContext
docs/core/testing/unit-testing-mstest-writing-tests.md	Write tests with MSTest
docs/core/testing/unit-testing-visual-basic-with-mstest.md	docs/core/testing/unit-testing-visual-basic-with-mstest
docs/navigate/devops-testing/index.yml	.NET DevOps, testing, and deployment documentation
docs/navigate/devops-testing/toc.yml	docs/navigate/devops-testing/toc

[Copilot]

Pull request overview

This pull request reworks the MSTest documentation to be feature-oriented, following up on PR #50979. The changes reorganize documentation from an attribute-centric structure to a feature-based organization that better supports developers learning MSTest.

Changes:

• Deleted the comprehensive attributes page (unit-testing-mstest-writing-tests-attributes.md) and redistributed content into feature-specific documents
• Created new feature-oriented documentation files: data-driven testing, lifecycle management, execution control, and test organization
• Reorganized the table of contents to group documentation by testing concepts rather than API elements
• Updated cross-references throughout the documentation
• Added redirects for deleted/moved pages

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
docs/navigate/devops-testing/toc.yml	Reorganized MSTest section, moved framework order (MSTest first, then NUnit, xUnit)
docs/navigate/devops-testing/index.yml	Updated link from runner intro to running tests overview
docs/core/testing/unit-testing-mstest-writing-tests.md	Rewrote as feature overview with quick reference tables
docs/core/testing/unit-testing-mstest-writing-tests-organizing.md	New file covering test metadata and organization attributes
docs/core/testing/unit-testing-mstest-writing-tests-lifecycle.md	Expanded lifecycle documentation with detailed examples
docs/core/testing/unit-testing-mstest-writing-tests-data-driven.md	New comprehensive guide to data-driven testing
docs/core/testing/unit-testing-mstest-writing-tests-controlling-execution.md	New guide for execution control attributes
docs/core/testing/unit-testing-mstest-writing-tests-assertions.md	Enhanced assertions documentation
docs/core/testing/unit-testing-mstest-intro.md	Expanded overview with platform support details
docs/core/testing/unit-testing-mstest-getting-started.md	Restructured getting started guide
docs/core/testing/unit-testing-mstest-sdk.md	Updated to focus on configuration
docs/core/testing/unit-testing-mstest-running-tests.md	Consolidated runner information from deleted intro file
Language-specific tutorials (C#, F#, VB)	Updated titles for consistency
Analyzer documentation	Updated cross-references to new document structure
.openpublishing.redirection.core.json	Added redirects for deleted pages

[Youssef1313]

Not fully reviewed yet, but so far LGTM aside from some comments.

[meaghanlewis]

These changes LGTM. I left a handful of suggestions for you.