[php-src] PR #24217: ext/pgsql: fix wrong names and values in three diagnostics

Pull Request: https://github.com/php/php-src/pull/24217 Author: lacatoire - The "Unable to jump to row" warning of pg_fetch_result(), pg_fetch_row()/assoc()/array()/object(), pg_field_prtlen() and pg_field_is_null() printed Z_LVAL_P() of a PgSql\Result object as a "result index", i.e. the object address. The operand is dropped. - pg_lo_write() referred to a nonexistent $buf parameter; it is $data. - pg_lo_read() is the only check worded "greater or equal than"; use "greater than or equal to" like the rest of the file. Before (master): ``` Warning: pg_fetch_row(): Unable to jump to row 99 on PostgreSQL result index 133586556570360 in ... pg_lo_write(): Argument #3 ($length) must be less than or equal to the length of argument #2 ($buf) pg_lo_read(): Argument #2 ($length) must be greater or equal than 0 ``` After: ``` Warning: pg_fetch_row(): Unable to jump to row 99 in ... pg_lo_write(): Argument #3 ($length) must be less than or equal to the length of argument #2 ($data) pg_lo_read(): Argument #2 ($length) must be greater than or equal to 0 ``` ext/pgsql/tests on PostgreSQL 16: 99 passed, 0 failed. Added pg_error_message_text.phpt, which fails on master; updated pg_lo_write_null_bytes.phpt.