Add make clean command to the Makefile

[aakankshabhende]

Description

Currently, we don't have any rule to target the clean command.

Expected Behaviour

This command will help to remove temporary or intermediate files generated during the build process. If the build fails due to any reason, this command will help for the clean up.

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[aakankshabhende]

@leecalcote @vishalvivekm I would like to work on this issue. Could you please assign me this?

[aakankshabhende]

I have the local site setup.