Align AOT metadata query rendering for IgnoreCase

[wonderfulrosemari]

Closes gh-2239

Align AOT-derived query metadata with runtime SQL rendering for IgnoreCase predicates.

Previously, AOT metadata rendered derived IgnoreCase queries as:
"column" = UPPER(:param)

while runtime query execution renders:
UPPER("column") = UPPER(:param)

Changes include:

• preserving string SQL type hints in AOT placeholder metadata for captured parameters
• keeping provided JdbcValue SQL type hints in QueryMapper when mapping criteria values
• adding regression coverage in JdbcRepositoryMetadataIntegrationTests for findByFirstnameIgnoreCase
• adding findByFirstnameIgnoreCase to the AOT test repository interface

[mp911de]

Thanks for the suggestion. We used a slightly different fix via c98bb62