Allow '_in' requisites to match both on ID and name

Under the hood, all '_in' requisites are changed to extends of their
corresponding type. For example, a require_in for a given state extends
the target of the require_in with a 'require' requisite, pointing back
at the state where the require_in was located.

When these extends are reconciled, only the ID declarations are examined
to see if there is a state matching the requisite's target, meaning that
these '_in' requisites cannot point to a 'name' override in the same way
as their counterparts are able to. For more info, see
https://github.com/saltstack/salt/issues/9061.

This commit modifies the extend reconciliation behavior. If there is no
ID declaration matching the requisite's target, then
salt.state.find_name() is used to search the high data for an ID
declaration with a 'name' param matching the requisite target. If a
match is found, then the extend is reconciled against that matching ID.
If no match is found, then the requisite is not found the appropriate
error is returned.
Merge pull request #9329 from terminalmage/issue9061

Allow '_in' requisites to match both on ID and name