Turning huge_pages off by default in the postgresql.conf.sample file.

[jmckulk]

Re-apply https://github.com/CrunchyData/crunchy-containers/pull/1518 [sc-17766]

Checklist:

• [ ] Have you added an explanation of what your changes do and why you'd like them to be included?
• [ ] Have you updated or added documentation for the change, as applicable?
• [ ] Have you tested your changes on all related environments with successful results, as applicable?

Type of Changes:

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

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