API and Main web endpoints recreate templates and dev mode locks and recreate templates on each read

[zeripath]

Description

The API and the main web page endpoints each create their own copy of the templates which should just be being created once and once only.

There's another issue whereby the dev version is simply locking all of the templates on read and recreating them thus potential concurrency issues with templates are likely being hidden on dev environments.

See also #20210

Gitea Version

1.16+

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

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Git Version

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Operating System

No response

How are you running Gitea?

N/A

Database

No response