Rollup merge of rust-lang#135251 - oli-obk:push-lmpyvvyrtplk, r=ytmimi

Only treat plain literal patterns as short

See rust-lang#134228 (comment) and rust-lang#134228 (comment) for context. We never wanted to treat const blocks and paths as short, only plain literals.

I don't know how to write a test for this, it.s not clear to me how the short pattern check actually affects the formatting

Author: matthiaskrgr