Alias doesn't handle `#` character in string

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

NeoVim

### Which OS are you using?

Linux

### What is the issue affecting?

Diagnostics/Syntax Checking

### Expected Behaviour

Enum members can contain `#` character

### Actual Behaviour

The LSP diagnostic reports an error on using it

### Reproduction steps

1. Create an enum alias with members containing `#`
Given the following alias
```lua---@alias component_url
---| "/vfx#impact_fx_creator"
---| "/sfx"
---| "/player#player_upgrader"
---| "/cauli"
---| "/game_over_ui"
---| "/in_game_ui"

```
2. Notice that the type check considers the right-hand of `#` as a comment even though it's in the string
```lua
---@type component_url
local d = "/vfx#impact_fx_creator"
```
4. See error
```
Diagnostics:
1. Cannot assign `string` to parameter `"/cauli"|"/game_over_ui"|"/in_game_ui"|"/player#"|"/sfx"...(+1)`.
- `string` cannot match `"/cauli"|"/game_over_ui"|"/in_game_ui"|"/player#"|"/sfx"...(+1)`
```

### Additional Notes

_No response_

### Log File

_No response_

Start by reproducing the enum-alias example from the issue in the Lua language server with the reported NeoVim setup, focusing on how `#` is parsed inside quoted members during diagnostics. Done means the full strings containing `#` remain enum members and the shown assignment no longer produces the reported type-check error.

Written by the indexing model from the issue text.