Show available make targets

[jjngx]

Proposed changes

make command defaults to target help. This behaviour aligns with make command in the root folder of the project.

Example:

➜  tests git:(acceptance-tests) ✗ make
help                 Show available make targets
build                Run build
run-tests            Run tests
run-tests-in-kind    Run tests in Kind
create-kind-cluster  Create Kind cluster
delete-kind-cluster  Delete Kind cluster

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto master
• I will ensure my PR is targeting the master branch and pulling from my branch from my own fork

[codecov-commenter]

Codecov Report

Merging #2467 (30341af) into master (9c4a516) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2467   +/-   ##
=======================================
  Coverage   53.66%   53.66%           
=======================================
  Files          48       48           
  Lines       14200    14200           
=======================================
  Hits         7620     7620           
  Misses       6342     6342           
  Partials      238      238           

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