Cache absence of lifetime dependencies during deserialization

[meg-gupta]

Fixes rdar://136769990

Absence of lifetime dependencies weren't cached which resulted in running LifetimeDependence::infer on deserialized decls.

USRGenerationRequest::evaluate can call to InterfaceTypeRequest::evaluate which in turn calls LifetimeDependence::infer which ends up calling USRGenerationRequest::evaluate due to a call to getLoc() leading to circular reference errors in a previous revision of the compiler.

This isn't an existing issue on main because the call to getLoc() in LifetimeDependence::infer only happens when result is ~Escapable. Fixing this anyhow, to avoid LifetimeDependence::infer on deserialized decls.

[meg-gupta]

@swift-ci test

[meg-gupta]

@swift-ci test

[atrick]

Thanks! Since this was difficult to catch and reproduce, is there any way to add a deserialization test?

[meg-gupta]

@atrick I added more details in the PR description. This does not cause "circular reference" errors on main. This PR is needed nevertheless to avoid calling into LifetimeDependence::infer on deserialized decls.

[meg-gupta]

@swift-ci smoke test macOS platform