test: add test cases related to rawset(_G, ...)

Author: tomlau10

test/type_inference/common.lua

@@ -1321,6 +1321,32 @@ TEST 'Test' [[
 _G.<?Test?> = {}
 ]]
 
+TEST 'integer' [[
+rawset(_G, 'Test', 1)
+print(<?Test?>)
+]]
+
+TEST 'string' [[
+rawset(_G, 'Test', '')
+print(<?Test?>)
+]]
+
+TEST 'boolean' [[
+rawset(_G, 'Test', true)
+print(<?Test?>)
+]]
+
+TEST 'table' [[
+rawset(_G, 'Test', {})
+print(<?Test?>)
+]]
+
+TEST 'Test' [[
+---@class Test
+rawset(_G, 'Test', {})
+print(<?Test?>)
+]]
+
 TEST 'integer' [[
 local mt = {}