Bump Nodejs; Fix PHPStan and PHPUnit failures #11395

Job	Run time
Pre run	4s
Lint: CSS	4s
Build: ${{ matrix.build }} build ZIP	0s
Feature tests: PHP 7.4, WP latest	4s
E2E test: JS (1, 2)	5s
Feature tests: PHP 8.3, WP trunk	3s
E2E test: JS (2, 2)	6s
Feature tests: PHP 8.2, WP trunk	4s
Lint: JS	2s
Lint: PHP	3s
Feature tests: PHP 8.1, WP trunk	3s
Feature tests: PHP 8.0, WP latest	4s
Feature tests: PHP 7.4, WP 5.3	4s
Static Analysis: PHP	3s
Unit test: JS	2s
Unit test: PHP 8.0, WP latest	3s
Unit test: PHP 8.3, WP trunk	1s
Unit test: PHP 8.2, WP trunk	3s
Unit test: PHP 8.1, WP trunk	1s
Unit test: PHP 8.0, WP trunk	1s
Unit test (with coverage): PHP 8.0, WP latest	3s
Unit test: PHP 8.0, WP latest	1s
Unit test: PHP 7.4, WP latest	3s
Unit test: PHP 7.4, WP latest	3s
Unit test: PHP 7.4, WP 5.3	2s
Unit test: PHP 7.4, WP 5.3	2s
Upload plugin ZIPs to Google Cloud Storage	0s
Comment on PR with links to plugin ZIPs	0s
	1m 14s

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