Remove %error-verbose directive from jsonpath parser

Andrew Dunstan <andrew@dunslane.net>

Commit: 2cf875a4b58d2bc2cce423b3c15fd01250966e40
Author: Andrew Dunstan <andrew@dunslane.net>
Date: 2022-07-03T21:17:08Z
Releases: 12.12
Remove %error-verbose directive from jsonpath parser

None of the other bison parsers contains this directive, and it gives
rise to some unfortunate and impenetrable messages, so just remove it.

Backpatch to release 12, where it was introduced.

Per gripe from Erik Rijkers

Discussion: https://postgr.es/m/ba069ce2-a98f-dc70-dc17-2ccf2a9bf7c7@xs4all.nl

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