[BUG] Incorrect signal being emitted in v2

[WolfgangSenff]

Godot version

3.5.3

Plugin version

v2.1.0

Phone information

All iOS devices

Issue description

When the GAD delegate calls to https://developers.google.com/admob/ios/api/reference/Protocols/GADFullScreenContentDelegate#-ad:didfailtopresentfullscreencontentwitherror:, the plugin fires the interstitial_failed_to_load signal. However, because it's attempting to present it, it should be interstitial_failed_to_show. This is of course in an older version, but is a simple fix, and I'm happy to open a PR for it, just can't at the moment due to having to find a work-around for this in my app.

Steps to reproduce

The issue is right here:

godot-admob-ios/plugin/admob/src/formats/Interstitial.mm

Line 87 in 4ceb5f9

AdMob::get_singleton()->emit_signal("interstitial_failed_to_load", (int) error.code);

Further, you can see that it's probably not intended to be load by looking at this line, which is firing the same signal, but correctly from the load call:

godot-admob-ios/plugin/admob/src/formats/Interstitial.mm

Line 50 in 4ceb5f9

AdMob::get_singleton()->emit_signal("interstitial_failed_to_load", (int) error.code);

Additional context

If you're willing to make a new release and don't have time to fix this yourself, I'm happy to open a PR. Let me know!

[gumaciel]

Thank you for opening this issue, It would be awesome if you open a PR!