[GN] Fix "gn gen --ide=vs" to ignore bundle_data targets.
[GN] Fix "gn gen --ide=vs" to ignore bundle_data targets.

In order to keep the BUILD.gn more readable by avoiding conditionals,
Chromium defines bundle_data on every platforms (as in the absence of
create_bundle they are just no-op stamp targets).

Fix "gn gen --ide=vs" to ignore bundle_data targets but not the
create_bundle targets (as there should be no such targets on Windows).

BUG=595915

Review URL: https://codereview.chromium.org/1811203003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#382197}

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