[6.1] Revert https://github.com/swiftlang/swift/pull/77550

[tshortli]

• Explanation: Reverts AST: Print opaque result types correctly in swiftinterfaces #77550 because that fix exposed a different existing bug in opaque type result printing where generic archetypes are not consistently resugared on stable addresses, yielding unparsable swiftinterfaces. While the swiftinterface files affected by the issue were actually incorrect both with and without the fix that is being reverted, returning to the status quo of incorrect but parsable output is the safest option for release/6.1.
• Scope: Libraries with functions that return the opaque result type of a different function within a generic context.
• Issue/Radar: rdar://142571577
• Original PR: N/A (this issue will either be reverted or fixed separately on main).
• Risk: Low, reverts a discretionary compiler fix.
• Testing: Existing test cases.
• Reviewer: @bnbarham

[tshortli]

@swift-ci please test