CAMEL-18377: camel-jpa - resue an EntityManager from the current tran…
…saction if possible
:warning: This PR changes Camel components and will be tested automatically.
:x: Finished component verification: 1 component(s) test failed out of 1 component(s) tested
:heavy_check_mark: Finished component verification: 0 component(s) test failed out of 1 component(s) tested
:heavy_check_mark: Finished component verification: 0 component(s) test failed out of 2 component(s) tested
:heavy_check_mark: Finished component verification: 0 component(s) test failed out of 1 component(s) tested
:x: Finished component verification: 1 component(s) test failed out of 1 component(s) tested
:heavy_check_mark: Finished component verification: 0 component(s) test failed out of 1 component(s) tested