Redshift dialect: replace AnyNumberOf with AnySetOf where it makes sense

[rpr-ableton]

Brief summary of the change made

In a lot of places in the Redshift dialect AnyNumberOf was used when we in fact AnySetOf is more appropriate.

Are there any other side effects of this change that we should be aware of?

No

Pull Request checklist

• Please confirm you have completed any of the necessary steps below.

• Included test cases to demonstrate any code changes, which may be one or more of the following:

  • .yml rule test cases in test/fixtures/rules/std_rule_cases.
  • .sql/.yml parser test cases in test/fixtures/dialects (note YML files can be auto generated with tox -e generate-fixture-yml).
  • Full autofix test cases in test/fixtures/linter/autofix.
  • Other.

• Added appropriate documentation for the change.

• Created GitHub issues for any relevant followup/future enhancements if appropriate.

[codecov]

Codecov Report

Merging #2561 (a82ea34) into main (812ed9a) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main     #2561   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          163       163           
  Lines        11828     11828           
=========================================
  Hits         11828     11828           

Impacted Files	Coverage Δ
src/sqlfluff/dialects/dialect_redshift.py	100.00% <100.00%> (ø)

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