feat(script): Script for rolling out env vars to render runners

[nalanj]

Describe your changes

To roll out providers updating in runners we needed to be able to ship some new env vars to existing runners. I went ahead and ran this against staging with the new variables we needed to ensure it was working correctly.

Usage:

ENVIRONMENT=staging \
OWNER_ID=<OWNER_ID> \
RENDER_API_KEY=<RENDER_API_KEY> \
KEY=PROVIDERS_RELOAD_INTERVAL \
VALUE=60000 \
node ./scripts/runner-env.js

Issue ticket number and link

https://linear.app/nango/issue/NAN-2105/dynamically-reload-providersyaml

Checklist before requesting a review (skip if just adding/editing APIs & templates)

• I added tests, otherwise the reason is:
• I added observability, otherwise the reason is:
• I added analytics, otherwise the reason is:

[linear]

NAN-2105 Dynamically reload `providers.yaml`