[REF][PHP8.2] Avoid dynamic properties in api_v3_ContactTypeTest

[braders]

Overview

Avoid dynamic properties in api_v3_ContactTypeTest

Before

Several properties set and retreived dynamically, which is deprecated in PHP 8.2. See https://lab.civicrm.org/dev/core/-/issues/3833 for context.

After

Correctly declare properties for api_v3_ContactTypeTest

Comments

_apiversion seems a bit pointlessly declared on line 17, as it's also declared in the parent, but I wasn't sure if there was a reason I'm missing so I've left it.

I've also tidied up some variables which were being set but not used.

[civibot]

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