Sync to upstream/release/628

[alexmccord]

What's new?

• Remove a case of unsound table.move optimization
• Add Luau stack slot reservations that were missing in REPL (fixes failed assert in script file crashes repl #1273)

New Type Solver

• Assignments have been completely reworked to fix a case of cyclic constraint dependency
• When indexing, if the fresh type's upper bound already contains a compatible indexer, do not add another upper bound
• Distribute type arguments over all type families sans eq, keyof, rawkeyof, and other internal type families
• Fix a case where buffers component weren't read in two places (fixes buffer library doesn't accept buffers in new type solver's non-strict mode #1267)
• Fix a case where things that constitutes a strong ref were slightly incorrect
• Fix a case where constraint dependencies weren't setup wrt for ... in statement

Native Codegen

• Fix an optimization that splits TValue store only when its value and its tag are compatible
• Implement a system to plug additional type information for custom host userdata types

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Internal Contributors

Co-authored-by: Aaron Weiss [email protected]
Co-authored-by: Alexander McCord [email protected]
Co-authored-by: Andy Friesen [email protected]
Co-authored-by: Vighnesh Vijay [email protected]
Co-authored-by: Vyacheslav Egorov [email protected]