adds lang to cascade targets

[bgdeutsch]

What does this PR do? What is the motivation?

adds lang to cascade targets. this is fixing an issue where these redirects could have been generated for the wrong language due to a possible race condition.

Merge instructions

• [ ] Please merge after websites reviewing

Additional notes

Pages are redirecting to the correct language site:

https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/integrations/akamai_datastream https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/integrations/eventviewer https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/api/latest/downtimes/s https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/security/cspm/custom_rules/aws_iam_user/

[github-actions[bot]]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/agent/
• https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/api/
• https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/infrastructure/
• https://docs-staging.datadoghq.com/brian.deutsch/target-alias-with-lang/integrations/