[Cherry-pick into next] [lldb] Change LLDBTypeInfoProvider to a local (per-module) TypeSystemSwift

[adrian-prantl]

commit bf89718b096b1690037fb6e9b52c9ab65a1305d7
Author: Adrian Prantl <[email protected]>
Date:   Fri Mar 28 13:34:44 2025 -0700

    [lldb] Change LLDBTypeInfoProvider to a local (per-module) TypeSystemSwift
    
    The decision of using a scratch context in TIP was made because
    reading types from a Process' reflection metadata can return types
    outside of the current lldb_private::Module. That'd be a huge problem
    for SwiftASTContext because it would pollute the context with ASTs
    from outside the Module, but TypeSystemSwiftTypeRef only deals in type
    names, which makes it immune to these risks.
    
    This change allows TypeAlias lookups to be made locally, which can
    dramatically speed up type resolution.  In a real-world benchmark of
    printing self in a large Swift/ObjC application the time spent in
    FindTypes() goes from 50% to it not even showing up on the profile.
    
    rdar://145884579