Fix deprecated `_admin_bar_bump_cb`; Fix failing PHP unit tests #10995

Job	Run time
Pre run	9s
Feature test: PHP 7.4, WP latest	3m 30s
Feature test: PHP 8.3, WP trunk	5m 43s
Lint: CSS	0s
Feature test: PHP 8.2, WP trunk	3m 17s
Build: ${{ matrix.build }} build ZIP	0s
E2E test: JS	11m 42s
Feature test: PHP 8.1, WP trunk	3m 16s
Feature test: PHP 8.0, WP latest	3m 20s
Lint: JS	0s
Feature test: PHP 7.4, WP 5.3	3m 20s
Lint: PHP	1m 13s
Normalize composer.json	14s
Static Analysis: PHP	1m 21s
Unit test: JS	0s
Unit test: PHP 8.0, WP latest	4m 1s
Unit test: PHP 8.3, WP trunk	3m 46s
Unit test: PHP 8.2, WP trunk	4m 24s
Unit test: PHP 8.1, WP trunk	3m 31s
Unit test: PHP 8.0, WP trunk	3m 43s
Unit test (with coverage): PHP 8.0, WP latest	6m 20s
Unit test: PHP 8.0, WP latest	4m 15s
Unit test: PHP 7.4, WP latest	4m 51s
Unit test: PHP 7.4, WP latest	5m 29s
Unit test: PHP 7.4, WP 5.3	4m 54s
Unit test: PHP 7.4, WP 5.3	3m 56s
Upload plugin ZIPs to Google Cloud Storage	0s
Comment on PR with links to plugin ZIPs	0s
	1h 26m 15s

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