Port over all context methods for v2 runtime

Currently some aspects don't yet show up in the v2 runtime (`context.log.metric`). We need to track and ensure all v1 pieces that should be are ported over to v2. Here is a test case that has a few of them that should pass without failure in v2.

https://github.com/Azure/azure-webjobs-sdk-script/blob/dev/test/WebJobs.Script.Tests.Integration/TestScripts/Node/Scenarios/index.js