Add a timeout delay prior to GTM init to fix intermittent YouTube video module loading problems

[bryanlandia]

Change description

Address intermittent failure to load YouTube video module content Apparently only an issue when customer uses Google Analytics<4 with Measure videos turned on Following solution proposed in https://discuss.openedx.org/t/first-video-on-lesson-dont-work/3836/3B

Type of change

• [x] Bug fix (fixes an issue)
• [ ] New feature (adds functionality)

Related issues

https://appsembler.atlassian.net/browse/ENG-97

Checklists

Development

• [x] Lint rules pass locally
• [x] Application changes have been tested thoroughly
• [ ] Automated tests covering modified code pass

Security

• [x] Security impact of change has been considered
• [x] Code follows company security practices and guidelines

Code review

• [x] Pull request has a descriptive title and context useful to a reviewer. Screenshots or screencasts are attached as necessary
• [ ] "Ready for review" label attached and reviewers assigned
• [ ] Changes have been reviewed by at least one other contributor
• [x] Pull request linked to task tracker where applicable