Disallow infinite endpoints in generate_series() for timestamps.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: e7adbd282dbf9bd53f9bafc1fbb866cbe546af52
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2022-04-20T22:08:15Z
Releases: 11.16
Disallow infinite endpoints in generate_series() for timestamps.

Such cases will lead to infinite loops, so they're of no practical
value.  The numeric variant of generate_series() already threw error
for this, so borrow its message wording.

Per report from Richard Wesley.  Back-patch to all supported branches.

Discussion: https://postgr.es/m/91B44E7B-68D5-448F-95C8-B4B3B0F5DEAF@duckdblabs.com

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