Skip catalog loading for the version command

[jx2lee]

Rationale for this change

pyiceberg version should print the installed PyIceberg version even when .pyiceberg.yaml or catalog-related environment variables are invalid. CLI group callback eagerly loads the catalog for every subcommand, so version can fail before it prints anything.

This change skips catalog loading for the version subcommand and adds a regression test for that behavior.

Are these changes tested?

Yes.

• Added test_version_does_not_load_catalog in tests/cli/test_console.py

Are there any user-facing changes?

Yes.

• pyiceberg version now prints the version without requiring valid catalog configuration.

[geruh]

Hey @jx2lee thanks for raising this. I think it makes sense to fix because a version sub command is a standard check. I took a quick pass at this and it seems like this is scoped down to missing and misconfiguration catlog setups as you mentioned.

But this also got me thinking, most users today are used to first running x --version from the cli. By moving to use clicks' click.version_option we can enable pyiceberg --version and wouldn't have to account for it in the sub commands.

Also, it's worth mentioning that a user running the --version command today will get:

> pyiceberg --version

Error: No such option: --version. Did you mean --verbose? 

But kind of thinking out loud here as this is small lol.

cc: @kevinjqliu