make template loader logic clearer
>>> [!note] Migrated issue
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<!-- Migrated from issue #3590694. -->
Reported by: [joachim](https://www.drupal.org/user/107701)
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>I wrote the new template loader service before I'd got the config loading in FinderConfigManager back into my head, and it's the wrong way round!</p>
<p>The fallback is the *common* template.<br>
The finder type-specific template is the FIRST one to try.</p>
<p>The parameters should be rearranged to reflect that.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<h3 id="summary-api-changes">API changes</h3>
<h3 id="summary-data-model-changes">Data model changes</h3>
issue