[FIX] website: properly flag website test tours as test tours

Commit [1] and [2] introduced test tours but did not mark them as test
tours properly, thus showing them to users (who are in debug=tests mode)
by mistake.

Note that [2] was silently fixed in the 16.0 forward-ported version...
that is why nothing shows up in this diff starting from 16.0.

[1]: https://github.com/odoo/odoo/commit/7655bface7f9e9bae8579e14e9a87b4f4801cc33
[2]: https://github.com/odoo/odoo/commit/a0c33c5f896718d1c03a6a50c981d6d75ce0d169



closes odoo/odoo#106689

X-original-commit: 11d023f0
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/website/static/tests/tours/focus_blur_snippets.js

@@ -51,6 +51,7 @@ function clickAndCheck(blockID, expected) {
 window.focusBlurSnippetsResult = [];
 
 tour.register('focus_blur_snippets', {
+    test: true,
     url: '/?enable_editor=1',
 }, [
     {