Msal2Provider: add support for @azure/msal-browser 3.x

[alecrt]

Msal2Provider actually depends on @azure/msal-browser version 2.x.
This makes it not usable with version 3.x.

Example:
const app = new PublicClientApplication(msalConfig); Providers.globalProvider = new Msal2Provider({publicClientApplication: app });

Something like that fails in Angular application since type 'import("node_modules/@azure/msal-browser/dist/app/PublicClientApplication").PublicClientApplication' is not assignable to type 'import("node_modules/@microsoft/mgt-msal2-provider/node_modules/@azure/msal-browser/dist/app/PublicClientApplication").PublicClientApplication'.