* MM-21357: Use typed constant for channel types
https://mattermost.atlassian.net/browse/MM-21357
```release-note
- Introduced a new type ChannelType for all channel types.
- Updated the Client4.UpdateChannelPrivacy method to ChannelType.
```
* Address review comments
```release-note
NONE
```
* telemetry fix
```release-note
NONE
```
* MM-34002: Improve AddUserToChannel
When we would add a user to a channel, we would
check whether the user is removed from that team or not.
During LDAP sync, this check is not required because the
team member would have just been created. Hence, we
pass a boolean flag to bypass the check.
And with that done, we can freely query the replica.
https://mattermost.atlassian.net/browse/MM-34002
```release-note
NONE
```
* Refactor code
* Rename a struct field
* fix double negative
During LDAP sync, we would call AddTeamMember which had a read-after-write issue
where we would create a team member but then immediately after that
query the team member.
The same pattern was found in:
AddTeamMember
AddTeamMembers
AddTeamMemberByToken
To fix this, we just return the inserted team member from AddUserToTeam and use that
instead of query GetTeamMember again.
```release-note
NONE
```
https://mattermost.atlassian.net/browse/MM-33913
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Remote Cluster Service
- provides ability for multiple Mattermost cluster instances to create a trusted connection with each other and exchange messages
- trusted connections are managed via slash commands (for now)
- facilitates features requiring inter-cluster communication, such as Shared Channels
Shared Channels Service
- provides ability to shared channels between one or more Mattermost cluster instances (using trusted connection)
- sharing/unsharing of channels is managed via slash commands (for now)
MM-27744 disable Zap for unit tests.
Zap has no concept of shutdown or close. Zap is only shutdown when the app exits. Not a problem for console logging, but when creating a new Zap logger that outputs to files on every unit test, that leaves no easy way to clean up until process exit. Depending on what else is running this can exhaust all file handles and cause unit tests to fail.
Zap is now disabled unit tests and uses Logr instead, regardless of config settings. `make test-server` peak file handle usage dropped from ~5K to less than 100.
