Closes gh-15171

Closes gh-15293

Closes gh-15292

Closes gh-15204

Closes gh-15286

Closes gh-15227

* pr/15206:
  Polish "Perform best effort to retrieve DataSourceProxy"
  Perform best effort to retrieve DataSourceProxy

Closes gh-15206

Prior to this commit, `DataSourceJmxConfiguration` with tomcat
`DataSource`, it can only find `DataSourceProxy` if the given
`DataSource` is a direct child of it.  Since it uses `instanceof`, it
could not find `DataSourceProxy` if the `DataSource` is
wrapped(delegated) or proxied.

This is because `DataSourceProxy#unwrap()` always returns null; thus
cannot use this method to directly obtain `DataSourceProxy`.

In this commit, updated the check logic to perform the best effort to
retrieve `DataSourceProxy`. If given `DataSource` is wrapped or proxied
by spring, tries to unwrap or get target datasource recursively to find
`DataSourceProxy`.

See gh-15206

Closes gh-15289

Closes gh-14990

Revert change inadvertently committed as part of gh-15017

Closes gh-15177

Closes gh-15220

Closes gh-15017

It's now a transitive dependency of jackson-dataformat-xml so there is no
need to depend on it explicitly.

Closes gh-15092