Add match case or_pattern

[trdthg]

try resolve #691, Currently, this is a minimal runnable example, and there are several points that may need attention

• Added a new variant Pat_many
• The desuger occurs during the initial_check process, so there will be no Pat_many appearances after desuger
  • But you have to add an error wherever Pat_many appears, Just like DEF_scattered. Is there a way to avoid this or eliminate the Pat_many variants?
• Set P_id to p#i, where i is the index of the origin pats in pat_list

-ddump-tc-ast 参考：

function main() : unit -> unit = {
    match 1 {
        1 => (),
        2, 3 => (),
    }
}

$[complete]
function main () : unit = {
    $[complete] match 1 {
      ($[int_wildcard 1] _) => (),
      p#1 if $[complete] match p#1 {
        2 => true,
        3 => true,
        _ => false
      } => ()
    }
}

[github-actions]

Test Results

   12 files  ±0     24 suites  ±0   0s ⏱️ ±0s
  738 tests ±0    738 ✅ ±0  0 💤 ±0  0 ❌ ±0 
2 466 runs  ±0  2 465 ✅ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit c3dd825. ± Comparison against base commit fd18b93.