Update the example pravega custom resource file

[nishant-yt]

Signed-off-by: Nishant Gupta Nishant_Gupta3@dell.com

Change log description

The current sample pravega custom resource file deploy/crds/cr.yaml is outdated and has many important fields missing when it comes to installing a pravega cluster manually and therefore needs an update.

Purpose of the change

Fixes #596

What the code does

Changes done:

• Removed the folder example as it is not longer relevant
• removed the file deploy/crds/cr.yaml and created a new sample custom resource file deploy/crds/pravega-cr.yaml.
• updated the documentation for manual installation

How to verify it

Install a pravega cluster using steps mentioned here and the cluster should be up and running

[codecov-commenter]

Codecov Report

Merging #597 (ca88872) into master (6a41b11) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #597   +/-   ##
=======================================
  Coverage   74.88%   74.88%           
=======================================
  Files          16       16           
  Lines        4428     4428           
=======================================
  Hits         3316     3316           
  Misses        978      978           
  Partials      134      134           

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