[DOCS-7323] Streamline Single Step Instrumentation Docs

[brett0000FF]

What does this PR do? What is the motivation?

• Streamline Single Step Instrumentation docs to be less overwhelming.
• Pull configuration options into new page.

Merge instructions

• [ ] Please merge after reviewing

Additional notes

[github-actions[bot]]

Preview links (active after the build_preview check completes)

New or renamed files

• https://docs-staging.datadoghq.com/brett0000FF/DOCS-7323/tracing/trace_collection/automatic_instrumentation/single-step-config

Modified Files

• https://docs-staging.datadoghq.com/brett0000FF/DOCS-7323/tracing/trace_collection/automatic_instrumentation/single-step-apm

[brett0000FF]

Addressed this in another PR: https://github.com/DataDog/documentation/pull/22566