Promote warnings to Errors in PostgreSQL extension

Do some drive by indentation fixes
Also fix pg_select() in regards to the $result_type arg which was missing from ZPP

Closes G

Promote warnings to Errors in PostgreSQL extension

Do some drive by indentation fixes
Also fix pg_select() in regards to the $result_type arg which was missing from ZPP

Closes GH-6129

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Use string|int union types in pgsql

For "field name or field offset" parameters.

Also make $ctor_params an ?array parameter.

Use proper int type for parameter

Fix default value

Add stub for pgsql extension