[Concurrency] Update how we add parameters to Task.init, change the AEIC funcs

[Concurrency] Lower availability for task names + addTask

WIP on changing the always emit into client funcs

Author: ktoso

Runtimes/Core/Concurrency/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_subdirectory(InternalShims)
 
+gyb_expand(Task+init.swift.gyb Task+init.swift)
 gyb_expand(TaskGroup+addTask.swift.gyb TaskGroup+addTask.swift)
 gyb_expand(Task+startSynchronously.swift.gyb Task+startSynchronously.swift)
 

stdlib/public/Concurrency/CMakeLists.txt

@@ -213,6 +213,7 @@ add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} I
   ${SWIFT_RUNTIME_CONCURRENCY_NONEMBEDDED_SWIFT_SOURCES}
 
   GYB_SOURCES
+    Task+init.swift.gyb
     TaskGroup+addTask.swift.gyb
     Task+startSynchronously.swift.gyb