Migrate SKIPIF -> EXTENSIONS (#7138)

This is an automated migration of most SKIPIF extension_loaded checks.

Support native types in PDO SQLite

Return integers and floats as native types if possible. As usual,
the old behavior can be restored by enabling ATTR_STRINGIFY_FETCHES.

Fixes b

Support native types in PDO SQLite

Return integers and floats as native types if possible. As usual,
the old behavior can be restored by enabling ATTR_STRINGIFY_FETCHES.

Fixes bug #38334.

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Rewrite PDO result binding

Instead of requiring the type to be determined in advance by the
describer function and then requiring get_col to return a buffer
of appropriate type, allo

Rewrite PDO result binding

Instead of requiring the type to be determined in advance by the
describer function and then requiring get_col to return a buffer
of appropriate type, allow get_col to return an arbitrary zval.
See UPGRADING.INTERNALS for a more detailed description of the
change.

This makes the result fetching simpler, more efficient and more
flexible. The general possibility already existed via the special
PDO_PARAM_ZVAL type, but the usage was very inconvenient and/or
inefficient. Now it's possible to easily implement behavior like
"return int if it fits, otherwise string" and to avoid any kind
of complex management of temporary buffers.

This also fixes bug #40913 (our second highest voted bug of all
time, for some reason). PARAM_LOB result bindings will now
consistently return a stream resource, independently of the used
database driver.

I've tried my best to update all PDO drivers for this change, but
some of the changes may be broken, as I cannot test or even build
some of these drivers (in particular PDO dblib and PDO oci).
Fixes are appreciated -- a working CI setup would be even more
appreciated ;)

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Report len as -1 instead of INT_MAX

Per docs it should be -1. And would be on 32-bit systems, but
not on 64-bit systems.

Fix #79664: PDOStatement::getColumnMeta fails on empty result set

As its name suggests, `sqlite3_data_count` returns the number of
columns in the current row of the result set; we are in

Fix #79664: PDOStatement::getColumnMeta fails on empty result set

As its name suggests, `sqlite3_data_count` returns the number of
columns in the current row of the result set; we are interested in the
number of columns regardless of the current row, so we have to use
`sqlite3_column_count` instead.

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