[v2] Add Integration Tests

[Andy2003]

This PR adds all relevant integration tests, that exists in neo4j-graphql (js).

Following bugs where found and fixed:

• handling paging correctly
• handling duration and temporal scalars correctly
• fixing union connection issues
• using correct logical operator for SOME and SINGLE relation predicates

The test-framework is extended by the following features:

• validating query results via JsonPath in asciidoc
• testing custom resolvers via asciidoc
• using neo4j-driver connection for integration tests

[github-actions]

Unit Test Results

       4 files         4 suites   1m 21s ⏱️
1 298 tests 1 283 ✔️ 15 💤 0 ❌
1 304 runs  1 289 ✔️ 15 💤 0 ❌

Results for commit 79c8c83.

♻️ This comment has been updated with latest results.