Overload type narrowing based on number of arguments instead of argument-type

With the following code:

---@overload fun(param1: "test", param2: string)
---@overload fun(param1: "test2", param2: number)
---@overload fun(param1: "test3", param2: boolean, param3: number)
local function test(...)
end

test("test", "string"); ---expected: good, actual: good
test("test2", 1); ---expected: good, actual: good
test("test3", true, 1); ---expected: good, actual: good

test("test", 1); ---expected: bad, actual: good
test("test2", "string"); ---expected: bad, actual: good

test("test", true, 2) ---expected: bad, actual: bad
test("test3", "string"); ---expected: bad, actual: bad
test("test3", "string", 1); ---expected: bad, actual: bad
test("test3", true); ---expected: bad, actual: bad

I get the following errors:

With these overloads I would of expected the type to be equivalent to this:

{
param1: "test"
param2: string
} | {
param1: "test2"
param2: number
} | {
param1: "test3"
param2: boolean
param3: number
}

However, it is actually equivalent to:

{
param1: "test" | "test2"
param2: string | number
} |
{
param1: "test3"
param2: boolean
param3: number
}

首先复现 issue 中的重载示例，并跟踪 language server 对重载函数调用的类型检查路径。修复完成的标准是：参数类型和参数数量一样能够缩小重载范围，接受所示的三个有效调用，并拒绝所示的不匹配调用。