Refactor index name expression resolver (elastic#92518)

The goals in this expression resolving refactoring are: * simplify the
`IndexNameExpressionResolver#WildcardExpressionResolver` class, eg. it
doesn't throw the "not found" exception for explicit resource names
(which are not wildcards) * have a separate step to handle explicit
names: it either ignores (silently drops) names of missing resources or
throws a "not found" exception, depending on the `ignore_unavailable`
request option. * encapsulate the exclusion logic (names starting with
"-" following another name that starts with "*" are exclusions)

Author: albertzaharovits