Fix two hook name to meet the naming convention for Dynamic-Hooks

[ramiy]

The ​new naming convention for Dynamic-Hooks set in #37748 is not applied for two new hooks introduced in wp4.7:

• apply_filters( 'handle_network_bulk_actions-' . get_current_screen()->id, $referer, $action, $themes, $id );

• apply_filters( 'handle_bulk_actions-' . get_current_screen()->id, $redirect_to, $doaction, $comment_ids );

We should replace the hook names to:

• "handle_network_bulk_actions-{get_current_screen()->id}"

• "handle_bulk_actions-{get_current_screen()->id}"

The change will also fix the issues we currently see in the code reference:

• ​https://developer.wordpress.org/reference/hooks/handle_bulk_actions-get_current_screen-id/

• ​https://developer.wordpress.org/reference/hooks/handle_network_bulk_actions-get_current_screen-id/

[ramiy]

@DrewAPicture please review the patch.

[jnylen0]

The proposed patches here will not work as intended:

$ wp shell
wp> function a() {}
wp> "some_text_{a()}"
=> string(15) "some_text_{a()}"

String interpolations inside curly braces must start with {$. See ​http://php.net/manual/en/language.types.string.php#language.types.string.parsing

[ocean90]

Duplicate of #39148.