patch: remove order dependency from anagram test

[neenjaw]

It was raised in the forum that the canonical problem specifications have several flaws:

• vague language
• are not congruent with the existing tests in many tracks

This change list removes the dependency on the order of the returned words that have been validated as candidates.

[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[mk-mxp]

Thanks for stepping in!

[neenjaw]

@mk-mxp your suggestions have been applie