Clean up the GYP official bot configs in MB.
Clean up the GYP official bot configs in MB.

This CL cleans up the names of some MB bot configs,
in preparation for adding the official bots
and the GN variants of the configs.

It also removes a redundant setting of the component
build from the official mixin (since we default to
static builds, we don't need to set them explicitly).

R=phajdan.jr@chromium.org, brettw@chromium.org
BUG=530733, 481692

Review URL: https://codereview.chromium.org/1365003004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#350925}

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