refs #15673 [master-v5]

* drop empty obsolete ajax controller
* drop obosolete controller factory
* add custom controller factories
* adjust module configuration

* adjustments to services, controllers and controller plugins configuration
** use vufind factory classes where possible and drop obsolete factory methods
** completety drop obsolete session manager factory
** drop unused rewrite plugin factory
** rename rewrite class and factory

* adjust ils driver, record driver, and recommend plugin configuration

* adjust record tab plugin configuration
* drop obsolete hierarchy tree factory method

* convert symbols to strings in finc module configuration
* remove as of #14414 unused factory class