CI(neon-extra-builds): Use small-arm64 runners instead of large-arm64

[bayandin]

Problem

There's not enough arm runners, and jobs in neon-extra-builds workflow take about the same amount of time on a small -arm runner as on large-arm.

Summary of changes

• Switch neon-extra-builds workflow from large-arm64 to small-arm64 runners

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]

3060 tests run: 2927 passed, 0 failed, 133 skipped (full report)

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Code coverage* (full report)

• functions: 31.4% (6332 of 20168 functions)
• lines: 47.3% (47828 of 101111 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
024b3b2 at 2024-05-13T16:24:21.025Z :recycle:}