[feat]: [CI-12621]: Parse Buildx Logs to get cache metrics (using channels) #22
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We need to parse the output of the docker buildx command and calculate cache metrics using that. In this PR we implement a Tee which takes a writer to write to and also creates another buffered channel to write to. The write function implemented by our Tee will write to stdout and to the channel.
The ParseCacheMetrics will read from the channel and parse metrics which it then writes to a file. We will display stats for all layers as well as the status and time for each layer