Improve PHP 8.4 compatibility #11642

Job	Run time
Pre run	4s
Lint: CSS	55s
E2E test: JS (1, 2)	8m 18s
Build: ${{ matrix.build }} build ZIP	0s
Feature tests: PHP 7.4, WP latest	2m 48s
E2E test: JS (2, 2)	4m 23s
Feature tests: PHP 8.4, WP trunk	3m 5s
Lint: JS	57s
Feature tests: PHP 8.3, WP trunk	2m 54s
Lint: PHP	44s
Static Analysis: PHP	1m 21s
Feature tests: PHP 8.2, WP trunk	3m 6s
Unit test: JS	1m 8s
Feature tests: PHP 8.1, WP trunk	2m 54s
Unit test: PHP 8.0, WP latest	3m 14s
Feature tests: PHP 8.0, WP latest	2m 46s
Unit test: PHP 8.4, WP trunk	1m 48s
Feature tests: PHP 7.4, WP 6.5	2m 57s
Unit test: PHP 8.3, WP trunk	1m 48s
Unit test: PHP 8.2, WP trunk	2m 12s
Unit test: PHP 8.1, WP trunk	2m 17s
Unit test: PHP 8.0, WP trunk	2m 21s
Unit test (with coverage): PHP 8.0, WP latest	4m 55s
Unit test: PHP 8.0, WP latest	2m 12s
Unit test: PHP 7.4, WP latest	3m 15s
Unit test: PHP 7.4, WP latest	2m 44s
Unit test: PHP 7.4, WP 6.5	3m 10s
Unit test: PHP 7.4, WP 6.5	2m 47s
Upload plugin ZIPs to Google Cloud Storage	0s
Comment on PR with links to plugin ZIPs	0s
	1h 11m 3s

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