Fix GH-10112: LDAP\Connection::__construct() refers to ldap_create()

There is no `ldap_create()`, but rather `ldap_connect()`.

Closes GH-10115.

Move resource-object classes of LDAP to `\LDAP` namespaces (#6963)

Another change as per accepted [namespaces in bundled extensions RFC](https://wiki.php.net/rfc/namespaces_in_bundled_extens

Move resource-object classes of LDAP to `\LDAP` namespaces (#6963)

Another change as per accepted [namespaces in bundled extensions RFC](https://wiki.php.net/rfc/namespaces_in_bundled_extensions).

Related: #6925, #5945, #6960

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