Make Symflower template generation a no-disk operation

[zimmski]

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Problem

https://github.com/symflower/eval-dev-quality/pull/428/commits/f17be9fcedfda394a0efbf8faa26d96a0bf6b773

Introduced a valid fix for a problem: we should not change the disk unless necessary. However, this template generation should not even be a disk operation if possible.

Solution (optional)

No response