Rich text: refactor toTree #88360

Job	Run time
Compute previous WordPress version	3s
JavaScript (16)	6m 38s
PHP coding standards	25s
Mobile	4m 25s
PHP 7.0 on ubuntu-latest	4m 57s
PHP 7.0 multisite on ubuntu-latest	4m 58s
PHP 7.1 on ubuntu-latest	5m 0s
PHP 7.1 multisite on ubuntu-latest	4m 47s
PHP 7.2 on ubuntu-latest	6m 44s
PHP 7.2 multisite on ubuntu-latest	5m 27s
PHP 7.3 on ubuntu-latest	5m 13s
PHP 7.3 multisite on ubuntu-latest	5m 28s
PHP 7.4 on ubuntu-latest	5m 4s
PHP 7.4 multisite on ubuntu-latest	5m 7s
PHP 8.0 on ubuntu-latest	5m 0s
PHP 8.0 multisite on ubuntu-latest	9m 27s
PHP 8.1 on ubuntu-latest	5m 15s
PHP 8.1 multisite on ubuntu-latest	5m 26s
PHP 8.2 on ubuntu-latest	8m 1s
PHP 8.2 multisite on ubuntu-latest	7m 16s
PHP 7.0 (WP 6.3.2) on ubuntu-latest	5m 13s
PHP 7.4 (WP 6.3.2) on ubuntu-latest	5m 9s
PHP 8.2 (WP 6.3.2) on ubuntu-latest	6m 46s
PHP	1s
	2h 1m 50s

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