build: move the entitlements next to the Homebrew formula

All consumers live in packaging already: the formula codesigns at
install, and the CI and release workflows codesign the built binary.
The macOS dir held nothing else.

packaging/homebrew/ecrou.entitlements

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0"><dict>
+<key>com.apple.security.hypervisor</key><true/>
+</dict></plist>