Change title tag formatting on wordpress.tv archive templates

[jonoaldersonwp]

Archive templates currently output a title tag in the following format:
{{ARCHIVE NAME}} | WordPress.tv | Page {{N}}

This should be altered to:
{{ARCHIVE NAME}} - Page {{N}} | WordPress.tv

Language-filtered archives include an additional component; e.g:
{{LANGUAGE NAME}} | Language | WordPress.tv | Page {{N}}

This should be altered to:
Videos in {{LANGUAGE NAME}} - Page {{N}} | WordPress.tv

In both cases, the first page in the series should omit the - Page {{N}} component.

[dd32]

In 8371:

WordPress.TV: Adjust the title formats.

This upgrades the theme to using the newer title support which handles the requested structure better.

Fixes #4209.

[dd32]

FYI: I've left it with a consistent - separator as Cores functions don't allow multiple separator types, I could force it, but didn't seem worth it. eg: {{ARCHIVE NAME}} - Page {{N}} - WordPress.tv

I also suffixed terms with the Taxonomy singular label, as it seemed the sanest option at the time, but I don't like it, so i'm going to re-do that with some more specific phrases, commit incoming.

[dd32]

In 8373:

WordPress.tv: Switch from a generic taxonomy title to more specific titles for each archive type.

See #4209.