Add scripts that manage k8s orchestration (Split-4)

Add scripts that manage k8s orchestration (Split-4)

- updated bash scripts for installing charts, running k6 tests,
  uninstalling deployment, and storing pod logs
- added environment variable: deploymentType to differentiate deployment
  cluster and hosts
- added hosts that is related to k8s cluster deployment
- updated readme.md
- set timeout to 300s for the pod availability
- increase resources (cpu and memory) for kafka and zookeper services to
  let them start successfully on virtual machine
- increase resources (cpu and memory) for dbpostgresql service to
  support at least 30K cm handle for the virtual test server

Issue-ID: CPS-2967

Change-Id: I464c551749725788019e1fec23a443085b2cb54d
Signed-off-by: halil.cakal <halil.cakal@est.tech>