chore: hide the docker password in cloudformation stacks

[tayritenour]

Ticket

Description

If you investigate the Cloudformation stacks on AWS, the DockerPass field is in plain text. This hides it by doing the same thing we are doing for DBPassword

Test Plan

Not needed to be tested in release party.

Checklist

• Changes have been manually QA'd
• New features have been approved by the corresponding PM
• User-facing API changes have the "User-facing API Change" label
• Release notes have been added as a separate file under docs/release-notes/
  See Release Note for details.
• Licenses have been included for new code which was copied and/or modified from any external code

[netlify]

✅ Deploy Preview for determined-ui canceled.

Name	Link
🔨 Latest commit	832ba69
🔍 Latest deploy log	https://app.netlify.com/sites/determined-ui/deploys/66902d78f30edb00089e4a8f

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.99%. Comparing base (53aa974) to head (832ba69).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9641      +/-   ##
==========================================
- Coverage   52.99%   52.99%   -0.01%     
==========================================
  Files        1255     1255              
  Lines      152884   152884              
  Branches     3234     3234              
==========================================
- Hits        81027    81026       -1     
- Misses      71706    71707       +1     
  Partials      151      151              

Flag	Coverage Δ
backend	44.18% <ø> (-0.01%)	⬇️
harness	72.78% <ø> (+0.01%)	⬆️
web	51.37% <ø> (ø)

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see 6 files with indirect coverage changes