Fix deprecated `_admin_bar_bump_cb`; Fix failing PHP unit tests #10997

Job	Run time
Pre run	4s
E2E test: JS	10m 34s
Lint: CSS	0s
Build: ${{ matrix.build }} build ZIP	0s
Feature test: PHP 7.4, WP latest	3m 23s
Feature test: PHP 8.3, WP trunk	3m 51s
Feature test: PHP 8.2, WP trunk	3m 26s
Lint: PHP	57s
Lint: JS	0s
Feature test: PHP 8.1, WP trunk	3m 37s
Normalize composer.json	13s
Feature test: PHP 8.0, WP latest	3m 29s
Feature test: PHP 7.4, WP 5.3	4m 2s
Static Analysis: PHP	1m 29s
Unit test: JS	0s
Unit test: PHP 8.0, WP latest	4m 35s
Unit test: PHP 8.3, WP trunk	3m 41s
Unit test: PHP 8.2, WP trunk	3m 51s
Unit test: PHP 8.1, WP trunk	4m 55s
Unit test: PHP 8.0, WP trunk	3m 44s
Unit test (with coverage): PHP 8.0, WP latest	7m 24s
Unit test: PHP 8.0, WP latest	5m 23s
Unit test: PHP 7.4, WP latest	5m 33s
Unit test: PHP 7.4, WP latest	4m 1s
Unit test: PHP 7.4, WP 5.3	3m 46s
Unit test: PHP 7.4, WP 5.3	4m 57s
Upload plugin ZIPs to Google Cloud Storage	0s
Comment on PR with links to plugin ZIPs	0s
	1h 26m 55s

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