Demangle an OpaqueArchetypeTypeRef's ID as a type not as a symbol

[augusto2112]

(cherry picked from commit e2febea)

rdar://104982758

Cherry-pick of https://github.com/apple/swift/pull/61091

---

• Explanation:

Fix a bug which would crash the demangler when trying to process opaque types when used from remote mirrors.

For example, when debugging the following code in LLDB:

protocol P {}

struct S: P {}

struct A<T> {
  let t: T
}
let p: some P = S()
let a = A(t: p)
print(1) // Stop here, run "v a"
}

The demangler will crash when trying to demangle the type of t without this change

• Main Branch PR: Demangle an OpaqueArchetypeTypeRef's ID as a type not as a symbol #62043

• Resolves: rdar://104982758

• Risk: Low. This has been merged in the main branch since December 21st with no problems. Also, only LLDB or other remote mirrors users should exercise this code path.

• Testing: LLDB test case added in [lldb] Add TestBoundOpaqueArchetype test llvm-project#5848.

[augusto2112]

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