Unnecessary list copies in `zoneinfo._common.load_tzdata`

[frostming]

Bug description:

This specific lines in the module:

cpython/Lib/zoneinfo/_common.py

Lines 7 to 9 in ee47670

	components = key.split("/")
	package_name = ".".join(["tzdata.zoneinfo"] + components[:-1])
	resource_name = components[-1]

Creates a list copy with components[:-1] which can be avoided by using list unpacking, which would affect the performance slightly.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-141970: use list unpacking to avoid unnecessary list copies #141972