[MM-154] Updated the default setting for meeting ID

[raghavaggarwal2308]

Summary

• Updated the default setting for meeting ID
• Updated the message on "ask meeting type" slack attachment.

Screenshot:

What to test:

• When a user creates a Zoom meeting, he should get an attachment to select the meeting type for that meeting. Note: Make sure that the user has not set their meeting preference with the /zoom settings command.

Ticket Link

Fixes https://community.mattermost.com/core/pl/nc17jfy4zi85jcq7dw57j1trwy

[codecov[bot]]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (4084345) 18.42% compared to head (f1554db) 18.41%.

Files	Patch %	Lines
server/http.go	0.00%	7 Missing :warning:
server/command.go	33.33%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #339 +/- ## ========================================== - Coverage 18.42% 18.41% -0.02% ========================================== Files 9 9 Lines 1514 1515 +1 ========================================== Hits 279 279 - Misses 1184 1185 +1 Partials 51 51 ```

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