Adapt HTTP and Postgres spans

The HTTP spans wrapping the Apollo and Yoga spans now have `POST
/graphql` in their span name. This seems like a good change.

The PostgreSQL spans now have the name of the DB after the span
name, and their name more closely resembles a span category. In
addition, there are now spans that represent the connection. We
should amend the extractor to better deal with these spans.

test/express-apollo/tests/spec/app_spec.rb

@@ -12,7 +12,7 @@
       graphql_query = "{ books { title author } }"
       response = HTTP.post("#{@test_app_url}/graphql", :json => { :query => graphql_query })
 
-      expect(Span.root!).to be_http_span_with_route("HTTP POST")
+      expect(Span.root!).to be_http_span_with_route("POST /graphql")
       expect(response.code.to_i).to eq(200)
       expect(graphql_query).to have_graphql_span
     end

test/express-yoga/tests/spec/app_spec.rb

@@ -12,7 +12,7 @@
       graphql_query = "{ books { title author } }"
       response = HTTP.post("#{@test_app_url}/graphql", :json => { :query => graphql_query })
 
-      expect(Span.root!).to be_http_span_with_route("HTTP POST")
+      expect(Span.root!).to be_http_span_with_route("POST /graphql")
       expect(response.code.to_i).to eq(200)
       expect(graphql_query).to have_graphql_span
     end

test/helpers/span.rb

@@ -92,7 +92,7 @@ def transitive_parent_of?(child)
   def sql_child_by_library_and_type(library:, type:)
     sql_span = children.find do |child_span|
       child_span.instrumentation_library_name == library &&
-        child_span.name == type
+        child_span.name.start_with?(type)
     end
 
     unless sql_span