allow disabling jpa integration per datasource

[graemerocher]

• c: projectVersion=5.9.0-SNAPSHOT [ci skip]
• fix(deps): update dependency io.micronaut.validation:micronaut-validation-bom to v4.7.0 (#1426)
• fix(deps): update dependency io.micronaut.serde:micronaut-serde-bom to v2.11.0 (#1425)
• fix(deps): update dependency io.micronaut.cache:micronaut-cache-bom to v5 (#1424)
• fix(deps): update dependency io.micronaut.test:micronaut-test-bom to v4.5.0 (#1423)
• fix(deps): update dependency io.micronaut.reactor:micronaut-reactor-bom to v3.5.0 (#1422)
• fix(deps): update micronaut.test.resources to v2.6.0 (#1421)
• fix(deps): update dependency io.micronaut.r2dbc:micronaut-r2dbc-bom to v5.6.1 (#1420)
• fix(deps): update dependency io.micronaut.micrometer:micronaut-micrometer-bom to v5.8.0 (#1413)
• fix(deps): update dependency io.micronaut.beanvalidation:micronaut-hibernate-validator to v4.5.0 (#1419)
• Allow disabling JPA configuration per datasource