feat: simd negate and abs

[clintropolis]

Description

opt-in jdk.incubator.vector specializations for negate and abs unary expressions. Benchmarks look pretty nice:

64,65: unary negate on a double column (companion to 15 which does long negate)
SELECT SUM(-double1) FROM expressions
SELECT SUM(-double4) FROM expressions
66,67: unary abs on long and double columns
SELECT SUM(ABS(long4)) FROM expressions
SELECT SUM(ABS(double1)) FROM expressions
68: unary abs of a binary subtraction (composes SIMD sub with SIMD abs)
SELECT SUM(ABS(long1 - long4)) FROM expressions

Benchmark                        (complexCompression)  (deferExpressionDimensions)  (jsonObjectStorageEncoding)  (query)  (rowsPerSegment)  (schemaType)  (storageType)  (stringEncoding)  (useVectorApi)  (vectorize)  Mode  Cnt   Score   Error  Units
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       64           1500000      explicit           MMAP              UTF8           false        force  avgt    5  16.052 ± 0.910  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       64           1500000      explicit           MMAP              UTF8            true        force  avgt    5   5.294 ± 0.283  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       65           1500000      explicit           MMAP              UTF8           false        force  avgt    5  13.288 ± 0.605  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       65           1500000      explicit           MMAP              UTF8            true        force  avgt    5   3.085 ± 0.312  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       66           1500000      explicit           MMAP              UTF8           false        force  avgt    5  10.602 ± 0.592  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       66           1500000      explicit           MMAP              UTF8            true        force  avgt    5   5.687 ± 0.427  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       67           1500000      explicit           MMAP              UTF8           false        force  avgt    5  15.691 ± 2.852  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       67           1500000      explicit           MMAP              UTF8            true        force  avgt    5   5.186 ± 0.267  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       68           1500000      explicit           MMAP              UTF8           false        force  avgt    5  15.786 ± 0.647  ms/op
SqlExpressionBenchmark.querySql                  NONE                 singleString                        SMILE       68           1500000      explicit           MMAP              UTF8            true        force  avgt    5  10.682 ± 0.454  ms/op

[FrankChen021]

I have reviewed the code for correctness, edge cases, concurrency, and integration risks; no issues found.

Reviewed 11 of 11 changed files.

---

This is an automated review by Codex GPT-5.6-Sol