[ty] Implement goto-type for inlay type hints (#21533)

This PR generalizes the signature_help system's SignatureWriter which
could get the subspans of function parameters.
We now have TypeDetailsWriter which is threaded between type's display
implementations via a new `fmt_detailed` method that many of the Display
types now have.

With this information we can properly add goto-type targets to our inlay
hints. This also lays groundwork for any future "I want to render a type
but get spans" work.

Also a ton of lifetimes are introduced to avoid things getting conflated
with `'db`.

This PR is broken up into a series of commits:

* Generalizing `SignatureWriter` to `TypeDetailsWriter`, but not using
it anywhere else. This commit was confirmed to be a non-functional
change (no test results changed)
* Introducing `fmt_detailed` everywhere to thread through
`TypeDetailsWriter` and annotate various spans as "being" a given Type
-- this is also where I had to reckon with a ton of erroneous `&'db
self`. This commit was also confirmed to be a non-functional change.
* Finally, actually using the results for goto-type on inlay hints!
* Regenerating snapshots, fixups, etc.

crates/ty_python_semantic/src/types.rs

@@ -50,8 +50,8 @@ use crate::types::constraints::{
 };
 use crate::types::context::{LintDiagnosticGuard, LintDiagnosticGuardBuilder};
 use crate::types::diagnostic::{INVALID_AWAIT, INVALID_TYPE_FORM, UNSUPPORTED_BOOL_CONVERSION};
-pub use crate::types::display::DisplaySettings;
 use crate::types::display::TupleSpecialization;
+pub use crate::types::display::{DisplaySettings, TypeDetail, TypeDisplayDetails};
 use crate::types::enums::{enum_metadata, is_single_member_enum};
 use crate::types::function::{
     DataclassTransformerFlags, DataclassTransformerParams, FunctionDecorators, FunctionSpans,