Refactor offset tests

[AdRiley]

Pull Request Description

• Change the offset tests to expect table results rather than individual columns results.
• This is particularly important when we need to test the results are correct but in a different order
• Add a flag to Table.should_equal to ignore order

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.
• If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries,
  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
  • If applicable, it is suggested to paste a link to a successful run of the Extra Tests.

[radeusgd]

I think it's a good idea to introduce ignore_order argument to Table equality check.

But if we are introducing it, we need to make sure it works for various cases (as noted in the comments, sorting by first column is not sufficient). I'd also suggest adding the "(sorted)" suffix if we are indeed now displaying sorted tables in Actual/Expected OR reverting to displaying the original tables there and noting that the comparison was done ignoring ordering.

I think we can make test failure messages nicer if we borrow from the should_equal_ignoring_order method:

• The collection X did not contain E.
• The collection contained an element E that was not expected.
  Could become:
  The table did not contain expected row R / The table contained an unexpected row R and then the Actual/Expected tables can be displayed.

But I think current level of reporting is also good enough - let's just make it precise and either say we are displaying sorted tables or display original ones.