[WIP] Fixes issue 5095

[xiongmao86]

Fixes #5095.

Check list:

• Followed lint naming conventions
• Added passing UI tests (including committed .stderr file)
• cargo test passes locally
• Executed cargo dev update_lints
• Added lint documentation
• Run cargo dev fmt

changelog: checking for collapsible span_lint_and_then calls.

[xiongmao86]

It looks very intimidating, and I solved some of them, but I really don't know how to setup Span and LintContext.

[xiongmao86]

Oh, there are place for internal lint clippy_lints/src/utils/internal_lints.rs.

[xiongmao86]

I have messed up with setting up test, the commits are heading the wrong way, thus abandoning this pr.

[flip1995]

Thanks for implementing this! If you want to start over and have any questions, I'm happy to answer!