Rollup of 9 pull requests

[matthiaskrgr]

Successful merges:

• Add basic i18n guidance for Display #121065 (Add basic i18n guidance for Display)
• errors: share SilentEmitter between rustc and rustfmt #121301 (errors: share SilentEmitter between rustc and rustfmt)
• Stop using Bubble in coherence and instead emulate it with an intercrate check #121744 (Stop using Bubble in coherence and instead emulate it with an intercrate check)
• Dummy tweaks (attempt 2) #121829 (Dummy tweaks (attempt 2))
• Implement async closure signature deduction #121857 (Implement async closure signature deduction)
• const_eval_select: make it safe but be careful with what we expose on stable for now #121894 (const_eval_select: make it safe but be careful with what we expose on stable for now)
• Add a description field to target definitions #121905 (Add a description field to target definitions)
• loongarch: add frecipe and relax target feature #122022 (loongarch: add frecipe and relax target feature)
• Remove some dead code #122028 (Remove some dead code)

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