[DebugInfo] Re-enable x86 async tests

With swiftlang/llvm-project#7787 merged, we can now finally
renable these tests, as the x86 swift async handling should be properly
preserved by the x86 instruction selector.

These tests contained some incorrect checks from a time where it was expecting
an entry value even in the entry funclet of coroutines. For example, it had
this:
```
CHECK-NEXT: [[ASYNC_REG:DW_OP_.*], DW_OP_plus_uconst 0x10, DW_OP_plus_uconst 0x8,
DW_OP_deref
```

Which tries to find some "async reg", but really matches anything. It worked by
accident on arm, but not on x86. The correct check is simply:

```
CHECK-NOT: OP_entry_value
```

Author: felipepiovezan

test/DebugInfo/move_function_dbginfo.swift

@@ -1,4 +1,3 @@
-// REQUIRES: CPU=arm64
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -parse-as-library -g -emit-ir -o - %s | %FileCheck %s
 // RUN: %target-swift-frontend -parse-as-library -g -c %s -o %t/out.o

test/DebugInfo/move_function_dbginfo_async.swift

@@ -1,4 +1,3 @@
-// REQUIRES: CPU=arm64
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -parse-as-library -disable-availability-checking -g -emit-sil -o - %s | %FileCheck -check-prefix=SIL %s
 // RUN: %target-swift-frontend -parse-as-library -disable-availability-checking -g -emit-ir -o - %s | %FileCheck %s
@@ -67,8 +66,8 @@ public func forceSplit5() async {}
 // DWARF1:  DW_AT_linkage_name	("$s3out13letSimpleTestyyxnYalF")
 // DWARF1:  DW_TAG_formal_parameter
 // DWARF1-NEXT: DW_AT_location
-// DWARF1-NEXT:	[[ASYNC_REG:DW_OP_.*]], DW_OP_plus_uconst 0x10, DW_OP_plus_uconst 0x8, DW_OP_deref
-// DWARF1-NEXT:  DW_AT_name ("msg")
+// DWARF1-NOT: OP_entry_value
+// DWARF1:  DW_AT_name ("msg")
 //
 // RUN: %llvm-dwarfdump -c --name='$s3out13letSimpleTestyyxnYalFTQ0_' %t/out.o | %FileCheck -check-prefix=DWARF2 %s
 // DWARF2:  DW_AT_linkage_name	("$s3out13letSimpleTestyyxnYalFTQ0_")
@@ -128,8 +127,8 @@ public func letSimpleTest<T>(_ msg: __owned T) async {
 // DWARF4: DW_AT_name	("varSimpleTest")
 // DWARF4: DW_TAG_formal_parameter
 // DWARF4-NEXT: DW_AT_location
-// DWARF4-NEXT:	[[ASYNC_REG:.*]], DW_OP_plus_uconst 0x10, DW_OP_plus_uconst 0x8, DW_OP_deref, DW_OP_deref
-// DWARF4-NEXT: DW_AT_name ("msg")
+// DWARF4-NOT:	OP_entry_value
+// DWARF4: DW_AT_name ("msg")
 //
 // RUN: %llvm-dwarfdump -c --name='$s3out13varSimpleTestyyxz_xtYalFTQ0_' %t/out.o | %FileCheck -check-prefix=DWARF5 %s
 // DWARF5: DW_AT_linkage_name	("$s3out13varSimpleTestyyxz_xtYalFTQ0_")
@@ -356,8 +355,8 @@ public func varSimpleTestVar() async {
 
 // DWARF17: DW_TAG_formal_parameter
 // DWARF17-NEXT: DW_AT_location
-// DWARF17-NEXT: [[ASYNC_REG:.*]], DW_OP_plus_uconst 0x10, DW_OP_plus_uconst 0x8, DW_OP_deref, DW_OP_deref
-// DWARF17-NEXT: DW_AT_name	("msg")
+// DWARF17-NOT: OP_entry_value
+// DWARF17: DW_AT_name	("msg")
 //
 // RUN: %llvm-dwarfdump -c --name='$s3out20letArgCCFlowTrueTestyyxnYalFTQ0_' %t/out.o | %FileCheck -check-prefix=DWARF18 %s
 // DWARF18: DW_AT_linkage_name	("$s3out20letArgCCFlowTrueTestyyxnYalFTQ0_")
@@ -493,8 +492,8 @@ public func letArgCCFlowTrueTest<T>(_ msg: __owned T) async {
 // DWARF24: DW_AT_name	("varArgCCFlowTrueTest")
 // DWARF24: DW_TAG_formal_parameter
 // DWARF24-NEXT:                     DW_AT_location
-// DWARF24-NEXT:                     [[ASYNC_REG:.*]], DW_OP_plus_uconst 0x10, DW_OP_plus_uconst 0x30, DW_OP_deref, DW_OP_deref
-// DWARF24-NEXT:                     DW_AT_name	("msg")
+// DWARF24-NOT:                      OP_entry_value
+// DWARF24:                     DW_AT_name	("msg")
 //
 
 // RUN: %llvm-dwarfdump -c --name='$s3out20varArgCCFlowTrueTestyyxzYaAA1PRzlFTQ0_' %t/out.o | %FileCheck -check-prefix=DWARF25 %s