Sentry misses some errors (due to late initialization)

[ChristopherChudzicki]

We load many script tags on OCW pages. Here's are the tags for https://ocw.mit.edu/courses/3-091-introduction-to-solid-state-chemistry-fall-2018/:

                    <script src='https://www.youtube.com/s/player/97ea7458/www-widgetapi.vflset/www-widgetapi.js'>
                    <script src='https://script.crazyegg.com/pages/versioned/common-scripts/2e2da7d3b3b2d712690eb56715b4f237.js'>
                    <script src='https://www.youtube.com/iframe_api'>
                    <script src='https://www.googletagmanager.com/gtag/js?id=G-NWDK3DX66P&l=dataLayer&cx=c'>
                    <script src='https://script.crazyegg.com/pages/scripts/0017/3534.js'>
                    <script src='https://www.google-analytics.com/analytics.js'>
                    <script src='https://www.googletagmanager.com/gtm.js?id=GTM-NMQZ25T'>
hugo partial        <script src=''>
hugo partial       <script src=''>
                    <script src='https://w.appzi.io/boot-wt-v2200-x6ucx7.js'>
hugo partial        <script src=''>
hugo partial        <script src=''>
hugo partial        <script src=''>
SENTRY INIT HERE    <script src='https://ocw.mit.edu/static_shared/js/common.29866.js'>
                    <script src='https://ocw.mit.edu/static_shared/js/course_v2.29866.js'>
                    <script src='https://w.appzi.io/w.js?token=Tgs1d'>

When errors occur before Sentry's initialization, we do not catch them.

In the wild: A real-world example of this is errors that occur in script tags included via hugo partials. Due to a separate issue, these script tags have not been transpiling correctly to ES5. Consequently, they have been throwing errors in some browsers (e.g., all versions of IE). But we haven't been catching those errors.

Additionally: Sentry on ocw-www does not seem to initialize in IE (but does on course pages). Loading earlier might fix that issue, too.

Acceptance Criteria

• Initialize sentry (but not the rest of the bundle) earlier.