Ensure SQLite connection strings adhere to recommendations

[rbottema]

As per umbraco/UmbracoDocs#4649, the preferred cache mode is Private. This updates the templates and other usages to actually use the cache mode Umbraco recommends.

[github-actions]

Hi there @rbottema, thank you for this contribution! 👍

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[georgebid]

Hey @rbottema thanks a lot for your PR, someone on the core collaborators team will review this soon 😄

[emmagarland]

Hi @rbottema

Thanks for this PR! Good catch re the documentation.

I've tested and it changes the connection string to Private as you say. However, the integration tests are now failing. I'm presuming this is to do with the change of connection string.

I merged the latest contrib into your branch to check again and the same thing happened, is this something you'd be able to double check or would you like me to reach out to HQ for some help?

Best regards

Emma