Fix positional binding when only later positions are reported

[hgwr]

Fix binding for EclipseLink when a derived query collapses to ... IS NULL AND ... = ?2 and the provider reports only position 2. We now bind positional parameters based on the reported positions (falling back to the previous size heuristic when no positional metadata is available).

This prevents Query argument 2 not found seen in #4167. Reproducer and logs: #4167 (comment).

Tests: ./mvnw -pl spring-data-jpa -Dtest=NamedOrIndexedQueryParameterSetterUnitTests test (local eclipselink-test fork still fails due to the existing EclipseLink javaagent ASM error).

[mp911de]

The problem is that the parameter binding index is being incremented leading to gaps in numbering and that is the actual problem to be fixed. Closing in favor of 747a3ee.