Add docs for CA1859 analyzer rule

[geeknoid]

Summary

Describe your changes here.

Fixes #Issue_Number (if available)

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Internal previews

📄 File	🔗 Preview link
docs/fundamentals/code-analysis/code-quality-rule-options.md	Code quality rule configuration options
docs/fundamentals/code-analysis/quality-rules/ca1859.md	docs/fundamentals/code-analysis/quality-rules/ca1859
docs/fundamentals/code-analysis/quality-rules/index.md	Code quality rules
docs/fundamentals/code-analysis/quality-rules/performance-warnings.md	Performance rules

[Youssef1313]

This is missing a toc entry I believe

[geeknoid]

This is missing a toc entry I believe

@Youssef1313 I searched for an existing rule number (CA1852 I think) and put references to 1859 in all the same spots. Which toc file do I need to add this to?

[gewarren]

The TOC to update is at https://github.com/dotnet/docs/blob/main/docs/navigate/tools-diagnostics/toc.yml.

Thanks for adding this!