[maintain/1841] Add log lines and organize log messages in tests

[HashNuke]

Issues: #1841

Description

• Publish a log message when a task is started. This helps identify when test starts running for a particular CNF.
• The task timestamps are now published to the info log irrespective of TASK_TIMESTAMPS=true being set.
• For log messages directly within the test task, publish log messages with Log.for instead of the top-level log (Log).

Screenshot

Ran a sanity check by running the workload command with the coredns CNF.

export KIND_CLUSTER_NAME="1834-3node"
export KUBECONFIG="${PWD}/${KIND_CLUSTER_NAME}.kubeconfig"
kind create cluster --name $KIND_CLUSTER_NAME \
--kubeconfig $KUBECONFIG \
--config kind-3node.yml

./cnf-testsuite setup
./cnf-testsuite cnf_setup cnf-path=sample-cnfs/sample-coredns-cnf
./cnf-testsuite workload

How has this been tested:

• Covered by existing integration testing
• Added integration testing to cover
• Verified all A/C passes
  • develop
  • master
  • tag/other branch
• Test environment
  • Shared Packet K8s cluster
  • New Packet K8s cluster
  • Kind cluster
• Have not tested

Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

Documentation

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• No updates required.

Code Review

• Does the test handle fatal exceptions, ie. rescue block

Issue

• Tasks in issue are checked off

[agentpoyo]

LGTM