[Admin/StreetCode/Авторство] [API] The admin can add text in the 'Авторство' block if no main text is added

[SophiaMRI]

Environment: All
Reproducible: Always
Build found: 79fb490

Preconditions

1. The site is open.
2. Logged in as admin.

Steps to reproduce

1. Open the new StreetCode page or the StreetCode page for editing.
2. Scroll down to the 'Авторство' block.
3. Add some text in the 'Авторство' field (Текст підготовлений спільно з ww).
4. Fill in all required fields.
5. Scroll down to the end of the page and save the StreetCode page.

Actual result
The StreetCode has been created with the 'Авторство' field filled.
The 'Авторство' text is not present on the front.

2024-05-31.19-19-40.mp4

Expected result
The 'Авторство' field is disabled if no main text is added.

User story and test case links
User story #122
[Test case] #1466