* refactor failed_tests_reporter to use TS, no octokit

* update renovate config

* ensure that all kbn-test files are in ts project

* fix some type errors

* add some more tests

* [kbn-test/githubapi] cleanup and document

* collect log messages as strings instead of message objects

* ensure issue is open when updating body

* improve readability of getKibanaIssues

* expose axios helpers from dev-utils

* fix request params for fetching github issues and validate locally

* include a README for failed_tests_reporter

* improve axios error helpers

# Conflicts:
#	package.json
#	packages/kbn-dev-utils/src/axios/errors.ts
#	packages/kbn-dev-utils/src/index.ts
#	packages/kbn-dev-utils/src/kbn_client/kbn_client_requester.ts
#	packages/kbn-test/src/index.ts
#	packages/kbn-test/src/mocha/junit_report_generation.js
#	renovate.json5
#	src/dev/jest/junit_reporter.js
#	yarn.lock

(cherry picked from commit 41134fe)