ZoneInfo object raises OSError instead of ZoneInfoNotFoundError for timezone input larger than 255 characters

Bug report

According to documentation all calls to ZoneInfo should raise ValueError or ZoneInfoNotFoundError.
Creating a ZoneInfo object with an invalid very long timezone (length > 255) an OSError is raised instead (OSError: [Errno 36] File name too long).

I believe that https://github.com/python/cpython/blob/29f1b0bb1ff73dcc28f0ca7e11794141b6de58c9/Lib/zoneinfo/_common.py#L11-L24 should also handle the OSError exception raised by open and reraise it to ZoneInfoNotFoundError.

Sample code for reproduction:

from zoneinfo import ZoneInfo
ZoneInfo("a"*256)

Your environment

• CPython versions tested on: Python 3.10.4
• Operating system and architecture: Debian GNU/Linux 11 (bullseye)

Linked PRs

• gh-99602

从 Lib/zoneinfo/_common.py 中引用的 open 调用开始，使用 ZoneInfo("a"*256) 重现该问题。检查针对无效时区输入的现有异常行为，然后验证长输入产生的是文档所述的异常，而不是 OSError。关联的 PR gh-99602 表明相关工作已经在进行中。