Update references from wp_parse_args to bp_parse_args

[espellcaste]

As titled. Mainly for consistency. Review if certain bp_parse_args requires a filter key.

[imath]

Patch looks good, I'd probably take this opportunity to do so some WPCS cleanup eg:

$r = bp_parse_args(
	$args,
	array(

instead of
$r = bp_parse_args( $args, array(

[espellcaste]

In 13108:

Update all references from wp_parse_args to bp_parse_args.

Also, add WPCS improvements to align bp_parse_args correctly.

Props imath
Fixes #8564