Speed up build initialization for rules evaluation

What does this MR do and why?

Speed up build initialization for rules evaluation

We don't need these attributes to compute the variables for rules evaluation and they are quite slow for large pipelines.

See https://gitlab.com/gitlab-org/gitlab/-/issues/425789#note_1577240067

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Before	After

How to set up and validate locally

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MR acceptance checklist

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Related to #425789