fix: improve tracking of query analyzer list types

[jasonbahl]

What does this implement/fix? Explain your changes.

This modifies the QueryAnalyzer to only track list:$type_name for RootConnections.

Nested connections will not tag the query with list:$type_name as it was leading to over-purging.

see: wp-graphql/wp-graphql-smart-cache#225

Does this close any currently open issues?

related: wp-graphql/wp-graphql-smart-cache#225

Any other comments?

This should significantly reduce the amount of queries that are purged from common events such as publishing posts.

Before

Here we can see that a query for a Category and it's related posts will return a list:post key, meaning it will invalidate anytime a new post is published.

After

Here we do not see the list:post key, meaning that this query will not invalidate whenever a new post is published.

However, if a new post is published and associated with the "child" category, then this query will be purged because that will call purge on the ID of the child category.

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[jasonbahl]

NOTE: The Schema Linter is failing because the 1.14.4 release failed to upload the schema because the mariadb version in the workflow was having issues. The workflow has now been pinned and the next release should fix it.