* removed `.ci/dev/unit/Jenkinsfile` and
`.ci/dev/integration/Jenkinsfile` - they don't seem to be used anywhere
* switched mandatory tests to linear build - modeled after Corda
Enterprise
* switched nightly regression tests to linear build - modeled after
Corda Enterprise
* TM-197 switching 4.3 to use local k8s instances and also make the maximum duration of builds 3 hours, fix 1 test and ignore 2 flaky ones
* update to use local-k8s version of the plugin
Co-authored-by: Stefano Franz <roastario@gmail.com>