Remove Foundation patch that was upstreamed from CI

Author: finagolfin

swift-android-foundation-except-release.patch

@@ -62,20 +62,6 @@ index 758dd1df..02970992 100644
              if !useFallbackChdir {
                  try _throwIfPosixError(chdirResult)
              }
-@@ -942,13 +942,6 @@ open class Process: NSObject, @unchecked Sendable {
-         var spawnAttrs: posix_spawnattr_t? = nil
- #else
-         var spawnAttrs: posix_spawnattr_t = posix_spawnattr_t()
--#endif
--#if os(Android)
--        guard var spawnAttrs else {
--            throw NSError(domain: NSPOSIXErrorDomain, code: Int(errno), userInfo: [
--                    NSURLErrorKey:self.executableURL!
--            ])
--        }
- #endif
-         try _throwIfPosixError(posix_spawnattr_init(&spawnAttrs))
-         try _throwIfPosixError(posix_spawnattr_setflags(&spawnAttrs, .init(POSIX_SPAWN_SETPGROUP)))
 diff --git a/swift-testing/CMakeLists.txt b/swift-testing/CMakeLists.txt
 index 1be9a4b..bd7b1bd 100644
 --- a/swift-testing/CMakeLists.txt