add experimental flag to 3 more tests

Author: ktoso

test/Concurrency/Runtime/async_task_locals_isolated_deinit.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-build-swift -plugin-path %swift-plugin-dir -enable-experimental-feature IsolatedDeinit -Xfrontend -disable-availability-checking -parse-stdlib %import-libdispatch %s -o %t/a.out
+// RUN: %target-build-swift -enable-experimental-feature IsolatedDeinit -plugin-path %swift-plugin-dir -enable-experimental-feature IsolatedDeinit -Xfrontend -disable-availability-checking -parse-stdlib %import-libdispatch %s -o %t/a.out
 // RUN: %target-codesign %t/a.out
 // RUN: %env-SWIFT_IS_CURRENT_EXECUTOR_LEGACY_MODE_OVERRIDE=swift6 %target-run %t/a.out
 

test/Concurrency/flow_isolation.swift

@@ -1,5 +1,5 @@
-// RUN: %target-swift-frontend -strict-concurrency=complete -swift-version 5 -parse-as-library -emit-sil -verify %s
-// RUN: %target-swift-frontend -strict-concurrency=complete -swift-version 5 -parse-as-library -emit-sil -verify %s -enable-upcoming-feature RegionBasedIsolation
+// RUN: %target-swift-frontend -enable-experimental-feature IsolatedDeinit -strict-concurrency=complete -swift-version 5 -parse-as-library -emit-sil -verify %s
+// RUN: %target-swift-frontend -enable-experimental-feature IsolatedDeinit -strict-concurrency=complete -swift-version 5 -parse-as-library -emit-sil -verify %s -enable-upcoming-feature RegionBasedIsolation
 
 func randomBool() -> Bool { return false }
 func logTransaction(_ i: Int) {}

test/SILGen/inlinable_attribute.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-emit-silgen -module-name inlinable_attribute -emit-verbose-sil -warnings-as-errors -disable-availability-checking %s | %FileCheck %s
+// RUN: %target-swift-emit-silgen -enable-experimental-feature IsolatedDeinit -module-name inlinable_attribute -emit-verbose-sil -warnings-as-errors -disable-availability-checking %s | %FileCheck %s
 
 // CHECK-LABEL: sil [serialized] [ossa] @$s19inlinable_attribute15fragileFunctionyyF : $@convention(thin) () -> ()
 @inlinable public func fragileFunction() {