Use more efficient string replacement and prevent validation errors from Interactivity API experiment #11238

Job	Run time
Pre run	6s
Static Analysis: PHP	41s
Lint: PHP	39s
Lint: JS	0s
Lint: CSS	0s
Build: dev build ZIP	1m 2s
Build: prod build ZIP	1m 28s
E2E test: JS (1, 2)	4m 35s
Feature tests: PHP 7.4, WP latest	1m 41s
E2E test: JS (2, 2)	3m 48s
Unit test: JS	0s
Feature tests: PHP 8.3, WP trunk	1m 56s
Feature tests: PHP 8.2, WP trunk	1m 48s
Feature tests: PHP 8.1, WP trunk	1m 57s
Unit test: PHP 8.0, WP latest	2m 4s
Feature tests: PHP 8.0, WP latest	1m 43s
Unit test: PHP 8.3, WP trunk	1m 49s
Feature tests: PHP 7.4, WP 5.3	1m 42s
Unit test: PHP 8.2, WP trunk	1m 50s
Unit test: PHP 8.1, WP trunk	1m 41s
Unit test: PHP 8.0, WP trunk	1m 47s
Unit test (with coverage): PHP 8.0, WP latest	3m 30s
Unit test: PHP 8.0, WP latest	1m 36s
Unit test: PHP 7.4, WP latest	2m 8s
Unit test: PHP 7.4, WP latest	1m 57s
Unit test: PHP 7.4, WP 5.3	1m 51s
Unit test: PHP 7.4, WP 5.3	1m 29s
Upload plugin ZIPs to Google Cloud Storage	27s
Comment on PR with links to plugin ZIPs	4s
	45m 19s

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