Nightly build 2025.02.14

What's Changed

Toolchain and implementation changes 🛠️

• Superficial support for template modifier on symbolic bindings. by @zygoloid in #4948
• Move diagnostic helpers from Context to other files by @jonmeow in #4949
• Refactor implicit Self param into a member on SemIR::Function by @dwblaikie in #4928
• Avoid poisoning non identifier names by @bricknerb in #4884
• Move type functions off Context by @jonmeow in #4951
• Fix bad merge of comments introduced in #4884 by @bricknerb in #4955

Full Changelog: v0.0.0-0.nightly.2025.02.13...v0.0.0-0.nightly.2025.02.14