Large Lua files have "Not showing N further errors and warnings"

まだ誰も着手していません。

### How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Windows

### What is the issue affecting?

Diagnostics/Syntax Checking

### Problem

Related to: #1522

In large files, you can get into a situation where there are 0 errors reported in the errors pane except for "Not showing N further errors and warnings". Obviously, this makes it impossible to actually fix the errors, since you don't know what they are.

Thus, the bug seems to be that the Lua language server is incorrectly ignoring errors suppressed by the end-user, since they are still counting towards the 250 hardcoded (?) VSCode limit

### Reproduction steps

Use the following Lua file:

https://gist.github.com/Zamiell/d0ab9f0b9d0d48efe9a14c293e44f8f0/raw/272057baf5028400e2aefed958b8d31defb01f02/main.lua

With the following .luarc.json file:

```json
{
"$schema": "https://raw.githubusercontent.com/sumneko/vscode-lua/master/setting/schema.json",
"diagnostics.globals": [
"ActionTriggers",
"ActiveSlot",
"BabySubType",
"BackdropType",
"BatterySubType",
"BedSubType",
"BitSet128",
"BombSubType",
"BombVariant",
"ButtonAction",
"CacheFlag",
"Card",
"Challenge",
"ChampionColor",
"ChestSubType",
"CoinSubType",
"CollectibleType",
"Color",
"CppContainer",
"DamageFlag",
"Difficulty",
"Direction",
"DoorSlot",
"DoorState",
"DoorVariant",
"EffectVariant",
"Entity",
"EntityBomb",
"EntityCollisionClass",
"EntityEffect",
"EntityFamiliar",
"EntityFlag",
"EntityGridCollisionClass",
"EntityKnife",
"EntityLaser",
"EntityNPC",
"EntityPartition",
"EntityPickup",
"EntityPlayer",
"EntityProjectile",
"EntityPtr",
"EntityRef",
"EntityTear",
"EntityType",
"FamiliarVariant",
"Font",
"Game",
"GameStateFlag",
"GetPtrHash",
"GridCollisionClass",
"GridEntity",
"GridEntityDesc",
"GridEntityDoor",
"GridEntityPit",
"GridEntityPoop",
"GridEntityPressurePlate",
"GridEntityRock",
"GridEntitySpikes",
"GridEntityTNT",
"GridEntityType",
"GridRooms",
"HUD",
"HeartSubType",
"Input",
"InputHook",
"Isaac",
"ItemConfig",
"ItemPool",
"ItemPoolType",
"ItemType",
"KColor",
"KeySubType",
"Keyboard",
"LaserOffset",
"LaserSubType",
"Level",
"LevelCurse",
"LevelStage",
"LevelStateFlag",
"LocustSubtypes",
"ModCallbacks",
"Mouse",
"Music",
"MusicManager",
"NpcState",
"NullItemID",
"Options",
"PathFinder",
"PickupPrice",
"PickupVariant",
"PillColor",
"PillEffect",
"PlayerForm",
"PlayerSpriteLayer",
"PlayerType",
"PlayerTypes",
"PoopPickupSubType",
"PoopSpellType",
"ProjectileFlags",
"ProjectileParams",
"ProjectileVariant",
"QueueItemData",
"REPENTANCE",
"RNG",
"Random",
"RandomVector",
"RegisterMod",
"RenderMode",
"Room",
"RoomConfig",
"RoomDescriptor",
"RoomShape",
"RoomTransitionAnim",
"RoomType",
"SFXManager",
"SackSubType",
"SeedEffect",
"Seeds",
"ShockwaveParams",
"SkinColor",
"SortingLayer",
"SoundEffect",
"Sprite",
"StageType",
"StartDebug",
"TearFlags",
"TearParams",
"TearVariant",
"TemporaryEffect",
"TemporaryEffects",
"TrinketType",
"UseFlag",
"Vector",
"WeaponType",
"AwaitingTextInput",
"EID",
"Encyclopedia",
"ModConfigMenu",
"MinimapAPI",
"StageAPI",
"g",
"gd",
"getParentFunctionDescription",
"sandboxGetTraceback",
"sandboxTraceback"
],
"preloadFileSize": 5000,
"runtime.version": "Lua 5.3"
}
```

Then, you will see that there are `Not showing 2551 further errors and warnings.` in the "Problems" pane of VSCode.

リンクされた大きな main.lua ファイル、提供された .luarc.json、そして VS Code の Problems ペインを使って報告を再現し、その後、関連する issue #1522 と動作を比較します。diagnostics/syntax-checking のパスから始め、抑制された diagnostics が表示上限に引き続きカウントされる理由を特定します。完了の条件は、"Not showing N further errors and warnings" というメッセージだけが表示されるのではなく、本来の diagnostics に引き続きアクセスできることです。

索引モデルが issue の本文から書いたものです。