Test: Merge IntegrationTests into Tests

Consolidate all the tests into a single folders.  This change only moves
the IntegrationTests/Sources and IntegrationTests/Tests to their
respective directory.

A subsequent change will find better homes for the tests under
Tests/IntegrationTests.

Author: bkhouri

IntegrationTests/Fixtures/BinaryTargets/Inputs/DynamicLibrary/DynamicLibrary.m renamed to Fixtures/BinaryTargets/Inputs/DynamicLibrary/DynamicLibrary.m

@@ -778,6 +778,13 @@ let package = Package(
                 .unsafeFlags(["-static"]),
             ]
         ),
+        .target(
+            /** SwiftPM internal test suite support library */
+            name: "_IntergrationTestSupport",
+            dependencies: [
+                .product(name: "TSCTestSupport", package: "swift-tools-support-core"),
+            ]
+        ),
 
         .target(
             /** Test for thread-sanitizer. */
@@ -977,6 +984,14 @@ if ProcessInfo.processInfo.environment["SWIFTCI_DISABLE_SDK_DEPENDENT_TESTS"] ==
                 "_InternalTestSupport"
             ]
         ),
+        .testTarget(
+            name: "IntegrationTests",
+            dependencies: [
+                "_IntegrationTestSupport",
+                .product(name: "TSCTestSupport", package: "swift-tools-support-core"),
+                .product(name: "SwiftToolsSupport-auto", package: "swift-tools-support-core"),
+        ]
+        ),
         .testTarget(
             name: "CommandsTests",
             dependencies: [

IntegrationTests/Fixtures/BinaryTargets/Inputs/DynamicLibrary/include/DynamicLibrary.h renamed to Fixtures/BinaryTargets/Inputs/DynamicLibrary/include/DynamicLibrary.h

@@ -158,14 +158,6 @@ def main() -> None:
             shlex.split(f"swift run swift-test --configuration {args.config} --parallel {swift_testing_arg} {xctest_arg} --scratch-path .test {ignore}"),
         )
 
-        integration_test_dir = (REPO_ROOT_PATH / "IntegrationTests").as_posix()
-        call(
-            shlex.split(f"swift package --package-path {integration_test_dir} update"),
-        )
-        call(
-            shlex.split(f"swift run swift-test --package-path {integration_test_dir} --parallel {ignore}"),
-        )
-
     if is_on_darwin():
         run_bootstrap(swiftpm_bin_dir=swiftpm_bin_dir)
     logging.info("Done")