Add an improved graphqlOperationLoggingPlugin, deprecate the old loggingPlugin

[cuzzlor]

What ?

Add new improved GraphQL operation logging plugin.

Why ?

Over in another project we added audit logging output via logger.audit(...)

We wanted to audit every GraphQL operation with features not offered by the current loggingPlugin, so we added the following features:

• allow us to use logger.audit, not logger.info
• allow us to strip sensitive info from logged variables
• allow us to log output data for mutations (this allows audit entries to show exactly what was created / mutated from GraphQL mutation intput)
• allow us to easily ignore introspection queries without writing an ignore callback (breaking change)
• loggingPlugin shouldIgnore callback had a strange signature not matching the data received by apollo plugins (breaking change)
• add the operation type into output

Why not modify the existing logging plugin?

Since there are two breaking changes along with a heap of new functionality, I feel it's best to keep the existing plugin intact but deprecate it rather than replacing it with breaking changes.