Fix deprecated `_admin_bar_bump_cb`; Fix failing PHP unit tests #10992

Job	Run time
Pre run	6s
E2E test: JS	10m 47s
Build: ${{ matrix.build }} build ZIP	0s
Lint: CSS	0s
Feature test: PHP 7.4, WP latest	3m 55s
Feature test: PHP 8.3, WP trunk	4m 33s
Feature test: PHP 8.2, WP trunk	3m 19s
Lint: PHP	58s
Feature test: PHP 8.1, WP trunk	3m 35s
Lint: JS	0s
Normalize composer.json	10s
Feature test: PHP 8.0, WP latest	3m 25s
Feature test: PHP 7.4, WP 5.3	3m 3s
Static Analysis: PHP	1m 56s
Unit test: JS	0s
Unit test: PHP 8.0, WP latest	3m 42s
Unit test: PHP 8.3, WP trunk	3m 21s
Unit test: PHP 8.2, WP trunk	3m 37s
Unit test: PHP 8.1, WP trunk	3m 45s
Unit test: PHP 8.0, WP trunk	5m 7s
Unit test (with coverage): PHP 8.0, WP latest	7m 59s
Unit test: PHP 8.0, WP latest	5m 4s
Unit test: PHP 7.4, WP latest	3m 45s
Unit test: PHP 7.4, WP latest	3m 31s
Unit test: PHP 7.4, WP 5.3	3m 38s
Unit test: PHP 7.4, WP 5.3	3m 30s
Upload plugin ZIPs to Google Cloud Storage	0s
Comment on PR with links to plugin ZIPs	0s
	1h 22m 46s

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