Improve PHP 8.4 compatibility #11647

Job	Run time
Pre run	5s
Lint: CSS	59s
Build: dev build ZIP	1m 27s
E2E test: JS (1, 2)	8m 28s
Build: prod build ZIP	1m 53s
Feature tests: PHP 7.4, WP latest	2m 53s
E2E test: JS (2, 2)	4m 37s
Feature tests: PHP 8.4, WP trunk	2m 57s
Lint: JS	1m 0s
Feature tests: PHP 8.3, WP trunk	2m 49s
Lint: PHP	54s
Feature tests: PHP 8.2, WP trunk	3m 10s
Static Analysis: PHP	1m 14s
Feature tests: PHP 8.1, WP trunk	2m 54s
Unit test: JS	1m 3s
Feature tests: PHP 8.0, WP latest	2m 51s
Feature tests: PHP 7.4, WP 6.5	2m 51s
Unit test: PHP 8.0, WP latest	2m 28s
Unit test: PHP 8.4, WP trunk	1m 44s
Unit test: PHP 8.3, WP trunk	2m 20s
Unit test: PHP 8.2, WP trunk	2m 34s
Unit test: PHP 8.1, WP trunk	2m 32s
Unit test: PHP 8.0, WP trunk	3m 6s
Unit test (with coverage): PHP 8.0, WP latest	4m 41s
Unit test: PHP 8.0, WP latest	2m 25s
Unit test: PHP 7.4, WP latest	3m 20s
Unit test: PHP 7.4, WP latest	2m 55s
Unit test: PHP 7.4, WP 6.5	3m 21s
Unit test: PHP 7.4, WP 6.5	2m 58s
Upload plugin ZIPs to Google Cloud Storage	21s
Comment on PR with links to plugin ZIPs	0s
	1h 16m 50s

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