Auto merge of #10222 - Alexendoo:needless-lifetime-suggestion, r=flip1995

Add machine applicable suggestion for `needless_lifetimes`

changelog: [`needless_lifetimes`]: Add machine applicable suggestion

Fixes #9360

It doesn't make suggestions for async functions as the input lifetime spans are funky there

The examples in #5787 and #7271 no longer seem to FP this PR aside, I added tests for them rather than disabling the lint entirely for async functions, I don't know if there are further FPs there though

Closes #5787
Closes #7271

Author: bors