[SPIKE][download-requirements] Optimize packages downloading using the manifest file.

[sbbroot]

Is your spike related to a problem or idea? Please describe.
Currently we download all available packages regardless of what the user has chosen (components wise).

Describe the outcome you'd like
Download only needed packages for the components used.

What is the reason or source for the spike
To speed up download-requirements script and also reduce the amount of downloaded data.

Additional context
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DoD checklist

• Reader is able to understand the results of spike
• The results of the spike are presented in a table (to show simply what are compared or researched parameters) / not applicable
• Each value / cell in the results table is described more deeply below
• Demo of the spike (automated as much as possible)
• Design doc updated

[seriva]

Not going todo anymore spikes for Epiphany.