Webhooks: Register OutputExpansionStrategy for webhooks if Delivery API is not enabled (closes #20272)#20559

AndyButland merged 2 commits intomainumbraco/Umbraco-CMS:mainfrom

v16/bugfix/webhook-OutputExpansionStrategyumbraco/Umbraco-CMS:v16/bugfix/webhook-OutputExpansionStrategyCopy head branch name to clipboard