[Mellanox] [ECMP calculator] Add script usage and more information to script description in help option #13493
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Add script usage and more information to script description being printed in help option.
Why I did it
Missing information in script description in help option.
How I did it
Expand script description and add script usage.
How to verify it
Run the script with -h option.
Which release branch to backport (provide reason below if selected)
Description for the changelog
Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)