Fix bug GH-11246 cli/get_set_process_title initialisation failure on MacOS (PHP >= 8.2) #11273
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Additional PR along with PR #11247 targeting PHP>=8.2 due to commit b468d6f
Fixes #11246, when executing on MacOS it was found that the environ area my not be contiguous.
Checking the original Postgres implementation https://github.com/postgres/postgres/blob/master/src/backend/utils/misc/ps_status.c the PHP code fails if either argv or environ is non-contiguous whereas the original code only fails if argv is ever non-contiguous.
Additionally the end_of_area variable is changed even if we hit a non-contiguous environ section, another divergence from the original code