Update external test cases (#985)

Co-authored-by: JohnnyMorganz <[email protected]>

Author: github-actions[bot]

tests/inputs-luau-full_moon/attributes.lua

@@ -0,0 +1,17 @@
+@example
+function foo()
+end
+
+@native
+local function bar()
+end
+
+local foo = @example function() end
+
+@example
+function foo:bar()
+end
+
+@attribute1 @attribute2 @attribute3 @attribute4 @attribute5
+local function many_attributes()
+end

tests/snapshots/[email protected]

@@ -0,0 +1,22 @@
+---
+source: tests/tests.rs
+expression: "format(&contents, LuaVersion::Luau)"
+input_file: tests/inputs-luau-full_moon/attributes.lua
+---
+@example
+function foo() end
+
+@native
+local function bar() end
+
+local foo = @example function() end
+
+@example
+function foo:bar() end
+
+@attribute1
+@attribute2
+@attribute3
+@attribute4
+@attribute5
+local function many_attributes() end