Disable TO_UPPER(null) BWC tests prior to 8.17
#119213
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TO_UPPER/TO_LOWER incorrectly returned child's type, instead of KEYWORD. So a test like `TO_UPPER(null) == "..."` failed on type mismatch.
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TO_UPPER/TO_LOWER resolution incorrectly returned child's type (that could also be `null`, type `NULL`), instead of KEYWORD/TEXT. So a test like `TO_UPPER(null) == "..."` fails on type mismatch. This was fixed collaterally by elastic#114334 (8.17.0) Also, correct some of the tests skipping (that had however no impact, due to testing range). (cherry picked from commit edb3818)
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* ESQL: Rewrite TO_UPPER/TO_LOWER comparisons (#118870) This adds an optimization rule to rewrite TO_UPPER/TO_LOWER comparisons against a string into an InsensitiveEquals comparison. The rewrite can also result right away into a TRUE/FALSE, in case the string doesn't match the caseness of the function. This also allows later pushing down the predicate to lucene as a case-insensitive term-query. Fixes #118304. * Disable `TO_UPPER(null)`-tests prior to 8.17 (#119213) TO_UPPER/TO_LOWER resolution incorrectly returned child's type (that could also be `null`, type `NULL`), instead of KEYWORD/TEXT. So a test like `TO_UPPER(null) == "..."` fails on type mismatch. This was fixed collaterally by #114334 (8.17.0) Also, correct some of the tests skipping (that had however no impact, due to testing range). (cherry picked from commit edb3818)
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TO_UPPER/TO_LOWER resolution incorrectly returned child's type (that could also be
null, typeNULL), instead of KEYWORD/TEXT. So a test likeTO_UPPER(null) == "..."fails on type mismatch.This was fixed collaterally by #114334 (8.17.0)
Also, correct some of the tests skipping (that had however no impact, due to testing range).