[JN-1086] sanitizing question stableIds

[devonbush]

DESCRIPTION (include screenshots, and mobile screenshots for participant UX)

General hardening with respect to question stableIds. this prevents entering and saving stableIds with whitespace. this also hardens the export to sanitize the headers to handle special characters there. This was prompted by HeartHive realizing that their import had resulted in some questions with stableIds that had trailing whitespace.

TO TEST: (simple manual steps for confirming core behavior -- used for pre-release checks)

0. redeploy apiAdminApp
1. go to https://localhost:3000/ourhealth/studies/ourheart/env/sandbox/forms/surveys/oh_oh_mental?selectedElementPath=pages%5B0%5D.elements%5B2%5D
2. hit "Add next question"
3. attempt to type whitespace or other special chars into the editor

[sonarcloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud