Removes separate DB Migrations Container

[nickzelei]

This PR does a few things:

1. Removes the separate DB Migrations Container
2. Adds a very paired down version of golang-migrate Up into the main backend mgmt binary.
3. Updates compose and tilt environments to handle the changes listed above
4. Adds ability for backend service to handle migrations automatically on boot.

The new command is mgmt migrate up

I've tested these changes in both the compose and tilt environments.

This moves us closer towards a more simplified setup and helps chip away at #496

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Name	Status	Preview	Comments	Updated (UTC)
neosync-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 8, 2023 9:56pm

[codecov]

Codecov Report

Merging #524 (e6bb5dd) into main (1b26c70) will decrease coverage by 11.80%.
Report is 3 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #524       +/-   ##
===========================================
- Coverage   48.64%   36.84%   -11.80%     
===========================================
  Files          51       24       -27     
  Lines        4938     2467     -2471     
===========================================
- Hits         2402      909     -1493     
+ Misses       2261     1462      -799     
+ Partials      275       96      -179     

see 27 files with indirect coverage changes

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