Fixes symlink shuffling due to Tulsi artifact.
Fixes symlink shuffling due to Tulsi artifact.

For projects leveraging generated sources, having bazel-* symlinks
modified out from under Xcode can lead to a variety of unexpected
behavior. This change makes Tulsi use "tulsigen-*" variants when
running the Tulsi aspect, preserving the current values of bazel-* and
reducing the need to forcibly reload the project in Xcode.

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MOS_MIGRATED_REVID=125186120

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