Grant BypassRLS to new neon_superuser roles

[save-buffer]

Problem

Summary of changes

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[github-actions]

1264 tests run: 1209 passed, 0 failed, 55 skipped (full report)

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Flaky tests (1)

Postgres 14

• test_crafted_wal_end[last_wal_record_xlog_switch_ends_on_page_boundary]: debug

_{The comment gets automatically updated with the latest test results
f077171 at 2023-08-09T10:03:36.500Z :recycle:}

[ololobus]

@save-buffer any comments, why we need this? Comments in code would be nice too

[save-buffer]

I guess just to emulate superuser as closely as possible. User asked for it, so we added it, not really sure what else to add