[e2e] Include e2e resources as embed

[adrianriobo]

With the go version upgrade to 1.16 it is possible to use embed pakage to include the external resources used by e2e testing (sample specs, scripts, ...).

Using this mechanism will improve the portability of the e2e binary to run the test. Also it will help to avoid some specific setup required on certain MacOS versions for running the e2e binary.

• Use embed for e2e resources.
• Review crc-e2e cotainer definition to remove copy paste of e2e resources.

[stale]

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