Only store info for relevant standalone plugins in the transient cache

[mukeshpanchal27]

Follow-up on #1562

The current API query https://api.wordpress.org/plugins/info/1.2/?action=query_plugins&request[author]=wordpressdotorg&request[tag]=performance&request[per_page]=100 is returning some unrelated plugins like Plugin Check (PCP) and SQLite Database Integration. In the future, if anyone else uses Performance as a tag, it will also be added to our transient. However, we only need the standalone plugins defined in perflab_get_standalone_plugin_data().

I’ve also moved the array definition for $fields after the cache check, as it's redundant in the cached version.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: mukeshpanchal27 <mukesh27@git.wordpress.org>
Co-authored-by: swissspidy <swissspidy@git.wordpress.org>
Co-authored-by: adamsilverstein <adamsilverstein@git.wordpress.org>
Co-authored-by: felixarntz <flixos90@git.wordpress.org>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[adamsilverstein]

Nice!

[felixarntz]

@mukeshpanchal27 Great catch!

PR looks good, though one recommendation to improve performance.

[westonruter]

FYI: We forgot to account for plugin dependencies here. Follow-up PR: #1613