[GH-313] Redirect user when a new meeting is started

[raghavaggarwal2308]

Summary

• When a new meeting is started using the Zoom icon in the app bar/channel header the user is not getting redirected to the meeting tab because the meeting URL is undefined.
• We updated the logic to convert the response of the start meeting API to JSON for fetching the meeting URL.

What to test?

• When a user starts a new meeting using the Zoom icon in the app bar/channel header, he/she should be redirected to the meeting page.

Steps to reproduce:

• Click on the Zoom icon in the app bar/channel header. (Note: These should not be an existing meeting of the user in that channel)

Environment:

MM version: v7.8.10 Node version: 14.18.0 Go version: 1.19.0

Ticket Link

Fixes #313

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (dbbb587) 19.33% compared to head (9323ab4) 19.33%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #314 +/- ## ======================================= Coverage 19.33% 19.33% ======================================= Files 9 9 Lines 1479 1479 ======================================= Hits 286 286 Misses 1138 1138 Partials 55 55 ```

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