Edit Dataset Metadata: Dataset metadata fields couldn't set to empty result

[g-saracca]

What this PR does / why we need it:

Fix an issue were empty values were ignored.
Now that related API work was done, we can send empty values while updating a dataset.
This PR does that, so you can send an empty value of a not required field which previously had value.

Important: we also introduce sending the dataset internal version number while updating a dataset, to avoid unwanted changes if updating and outdated dataset, I will add test cases for that.

Which issue(s) this PR closes:

• Closes Edit Dataset Metadata: Dataset metadata fields couldn't set to empty result #598

Suggestions on how to test this:

Step 1: Run the Development Environment

1. Execute npm i.
2. Navigate with cd packages/design-system && npm i && npm run build.
3. Return with cd ../../.
4. Ensure you have a .env file similar to .env.example, with the variable VITE_DATAVERSE_BACKEND_URL=http://localhost:8000.
5. Navigate with cd dev-env.
6. Start the environment using ./run-env.sh unstable.
7. To verify the environment, visit http://localhost:8000 and check your local Dataverse installation.

Step 2: Test the feature

1. Create a dataset filling required and some non required fields.
2. Edit that dataset leaving empty non-required fields that had a value entered.

**Step 3: Test the new internal sourcer number validation.

1. Create a dataset.
2. Open the edit dataset page in two tabs.
3. In one update the dataset and save changes.
4. Then in the other one update the dataset again and save changes, a 400 error should be shown in an alert above the form as you are trying to update a dataset with an outdated internal version number.

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

No

[coveralls]

coverage: 97.592% (-0.05%) from 97.639%
when pulling 8b2d330 on fix/598-send-empty-values-also
into c5b2c32 on develop.

[g-saracca]

@ChengShi-1 , ready for review 👍🏼

[ChengShi-1]

Looks good. tested on my local environment, works well

[ofahimIQSS]

looking good, did further testing and didnt come across any issues.
https://github.com/user-attachments/assets/ff795256-c2f0-4c6f-8630-30f0cb6089f4