Un-XFAIL tests that were disabled due to FoundationXML crash

The change is now reverted swiftlang/swift#77309

Author: kateinoigakukun

test/swift-sdk/foundation/XML.swift

@@ -1,7 +1,6 @@
 // RUN: %{target_simple_swift_build}
 // RUN: %{wasm_run} %t.dir/.build/debug/Check.wasm | %{FileCheck} %s
 // REQUIRES: FileCheck
-// XFAIL: scheme=main
 
 import FoundationXML
 

test/swift-sdk/swiftpm-build.swift

@@ -3,4 +3,3 @@
 // RUN: %{swift} package init --package-path %t.dir --name Example
 // RUN: cp %S/Inputs/imports.swift %t.dir/Sources/Example/Imports.swift
 // RUN: %{target_swift_build} --package-path %t.dir
-// XFAIL: scheme=main

test/toolchain/swiftpm-build.swift

@@ -3,4 +3,3 @@
 // RUN: %{swift} package init --package-path %t.dir --name Example
 // RUN: cp %S/Inputs/imports.swift %t.dir/Sources/Example/Imports.swift
 // RUN: %{swift} build --package-path %t.dir --triple wasm32-unknown-wasi -Xswiftc -static-stdlib -Xswiftc -resource-dir -Xswiftc %{package_path}/usr/lib/swift_static
-// XFAIL: scheme=main