Add configuration property to specify jOOQ settings file

The property is named 'spring.jooq.config' and is of type Resource,
so that it supports classpath: and all the other common prefixes.

The config is loaded through JAXB. If JAXB is not on the classpath,
an exception is thrown. Also adds a failure analyzer for this exception.

Closes gh-38778

src/nohttp/allowlist.lines

@@ -4,3 +4,4 @@
 ^http://www.jdotsoft.com.*
 ^http://www.liquibase.org/xml/ns/dbchangelog/.*
 ^http://www.w3.org/2000/09/xmldsig.*
+^http://www.jooq.org/xsd/jooq-runtime-.*