term: clarifications (Aug)

[jorgeorpinel]

Continuation of #432

• "remote cache" -> "remote storage"
• Avoid "local cache". (It may be external). Use "cache directory" or maybe "project cache" instead.
• Review usage of "DVC" branding of terms (i/[^`]DVC / regex): Avoid "DVC cache, "DVC pipeline" (others) but keep when necessary, specially "DVC project", "DVC remote" (others)
  UPDATE: Done up to static/docs/commands-reference/metrics, moved to term: misc. clarifications #608.
• Review usage of term "step" (use "stage" when referring to pipelines).
• "step by step" -> "step-by-step"
• Use either "dataset(s)" or "data set(s)".
• Find regex r[au]ns? again, consider term "regenerate" instead.
• Review usage of "chain of command(s)". It does not mean what we intend it to. Check also the term "graph" and related (DAG).

[jorgeorpinel]

• Review usage of term "step" (use "stage" when referring to pipelines).

Should be fixed in 56f816f.