This commit improves JsonPathExpectationsHelper to allow a custom json
path configuration to be defined. The primary objective of a custom
configuration is to specify a custom mapper that can deserialize complex
object structure.
As part of this commit, it is now possible to invoke a Matcher against
a type that holds generic information, using a regular
ParameterizedTypeReference.
Given that the existing constructor takes a vararg of Object, this
commit also deprecates this constructor in favor of formatting the
expression String upfront.
Closes gh-31651
9f8038963f