Rollup of 7 pull requests

[RalfJung]

Successful merges:

• Tweak impl signature mismatch errors involving RegionKind::ReVar lifetimes #67460 (Tweak impl signature mismatch errors involving RegionKind::ReVar lifetimes)
• impl From<[T; N]> for Box<[T]> #71095 (impl From<[T; N]> for Box<[T]>)
• Make pointer offset methods/intrinsics const #71500 (Make pointer offset methods/intrinsics const)
• linker: Support -static-pie and -static -shared #71804 (linker: Support -static-pie and -static -shared)
• Implement RFC 2585: unsafe blocks in unsafe fn #71862 (Implement RFC 2585: unsafe blocks in unsafe fn)
• borrowck DefId -> LocalDefId #72103 (borrowck DefId -> LocalDefId)
• Add Peekable::next_if #72310 (Add Peekable::next_if)

Failed merges:

r? @ghost