local list Variables using only underscore is no longer supported

[Fusezion]

Skript/Server Version

[04:55:23 INFO]: [Skript] Skript's aliases can be found here: https://github.com/SkriptLang/skript-aliases
[04:55:23 INFO]: [Skript] Skript's documentation can be found here: https://docs.skriptlang.org/
[04:55:23 INFO]: [Skript] Skript's tutorials can be found here: https://docs.skriptlang.org/tutorials
[04:55:23 INFO]: [Skript] Server Version: 1.21.4-118-73f7736 (MC: 1.21.4)
[04:55:23 INFO]: [Skript] Skript Version: 2.10.0-nightly-9e69c9c08 (skriptlang-nightly)
[04:55:23 INFO]: [Skript] Installed Skript Addons: None
[04:55:23 INFO]: [Skript] Installed dependencies: None

Bug Description

When attempting to set a local list variable that only uses _ skript throws a parse error saying you can't use x symbol within a variable

Expected Behavior

Skript to retain default behavior when provided a local variable in the is reserved check

Steps to Reproduce

command /example:
    trigger:
        set {_::*} to 1,1,1

Errors or Screenshots

No response

Other

The fix to this simply not do this check if the variable is local, since the variable storage already doesn't store it.
Skript version info was taken from a skriptTestDev server

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