New plugins have existing posts on support pages

[Ipstenu]

I don’t know how else to explain this, but a newly approved plugin will have two posts in their forum for a while. It magically goes away on its own, but this shouldn’t be happening.

[Ipstenu]

Example

[dd32]

In 8620:

Support Forums: Create the plugin/theme term Just-in-time earlier in the page load to avoid the first-ever pageview for a plugin/theme support forum showing irrelevant topics.

This change also only creates terms for valid objects of that type, previously it was possible to create terms for objects that didn't yet exist.

Fixes #4342.

[dd32]

In 8634:

Support Forums: Fix a fatal error which could be encountered in [8620] under some rare conditions.

See #4342.

[dd32]

In 8638:

Support Forums: More term fixing where a non-ascii term could cause an OOM or fatal upon accessing a WP_Error like an array.

See #4342.