Improve error handling for Storage class

[jasonnutter]

The Storage class will only work if it is instantiated in an environment (the browser) where window.sessionStorage or window.localStorage exist. Currently, UserAgentApplication assumes that any uncaught error from the Storage constructor is a result of an invalid cacheLocation string, however, an error could be thrown if window doesn't exist at all, such as when msal is server-side rendered. We should add a new error message to catch this scenario.

See: #914

AC:

1. When msal is server-side rendered, it throws an error message communicating that it cannot be server-side rendered.

[jodonnell]

i believe this is causing syncweek-react-aad/react-aad#104 and the issues @scottyh527 is having at the bottom of this thread
syncweek-react-aad/react-aad#95

[jasonnutter]

@jodonnell Thanks, that info is helpful.

[github-actions]

This issue has not seen activity in 14 days. It may be closed if it remains stale.

[jasonnutter]

This is being addressed in MSAL.js v2, closing.