feat(optimizer)!: type annotation for databricks NANVL, SIGN, SHIFTLEFT, SIGNUM, SHUFFLE

[fivetran-amrutabhimsenayachit]

Summary

• Add class Nanvl(Func) to expressions/math.py and class Shuffle(Func) to expressions/array.py
• Add exp.Nanvl and exp.Sign to the DOUBLE group in sqlglot/typing/spark.py (overrides base INT annotation)
• Add pass-through array annotator for exp.Shuffle in sqlglot/typing/databricks.py
• Add 6 fixture entries in annotate_functions.sql (2× SHIFTLEFT, 3× SIGNUM, 1× SHUFFLE)
• Add integration test test_shuffle_type_annotation in sqlglot-integration-tests

Closes RD-1229681, RD-1229682, RD-1229683, RD-1229690, RD-1229691

[github-actions]

SQLGlot Integration Test Results

✅ All tests passed

Comparing:

• this branch (sqlglot:type-inference-batch-7 @ sqlglot 761d971)
• baseline (main @ sqlglot 91f6606)

Overall

main: 192414 total, 153544 passed (pass rate: 79.8%)

sqlglot:type-inference-batch-7: 180220 total, 142397 passed (pass rate: 79.0%)

Transitions:
No change

Dialect pair changes: 0 previous results not found, 3 current results not found

✅ All tests passed

[georgesittas]

@fivetran-amrutabhimsenayachit let's please not couple >1 function annotations in one PR. It makes reviewing and decoupling patching more difficult than it needs to be.