fix rudder key

[trilopin]

Summary

After some name changing, MM_RUDDER_WRITE_KEY has become MM_RUDDER_PLUGINS_PROD.

Fix custom.mk so we get the right data.

Additionally, there were missing architectures so I updated the make server command.

I tried to add arm64 architectures but it implies update to mattermost-server/v6 so I removed that from the PR. I kept the refactor for make server tho.

Ticket Link

no

[hanzei]

https://github.com/mattermost/mattermost-plugin-todo/blob/183fb72f1795b992997cfb583e479596dd408b99/plugin.json#L11-L15 need to get updated for the new architecture

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (183fb72) 6.87% compared to head (3569494) 6.87%.

❗ Current head 3569494 differs from pull request most recent head 3de1dca. Consider uploading reports for the commit 3de1dca to get more accurate results

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #205   +/-   ##
======================================
  Coverage    6.87%   6.87%           
======================================
  Files          10      10           
  Lines        1600    1600           
======================================
  Hits          110     110           
  Misses       1482    1482           
  Partials        8       8           

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[larkox]

Approving not to block the PR. Not sure if I understand everything that is going on on this PR.

[trilopin]

I reverted the changes related to arm64 since they required upgrading to v6 (and it's a blindspot to me).