Helm chart fixes

[perttus]

Problem

Helm chart has some minor issues

Solution

Add postgres user for pg_isreadyand fix image tag

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've updated the CHANGELOG.md with details about your change under the "Unreleased" section (if relevant, depending on the change, this may not be necessary)
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[boring-cyborg]

Thanks for opening your first pull request in the Marquez project! Please check out our contributing guidelines (https://github.com/MarquezProject/marquez/blob/main/CONTRIBUTING.md).

[codecov]

Codecov Report

Merging #2374 (190b454) into main (c7c89df) will not change coverage.
The diff coverage is n/a.

❗ Current head 190b454 differs from pull request most recent head 5f64b67. Consider uploading reports for the commit 5f64b67 to get more accurate results

@@            Coverage Diff            @@
##               main    #2374   +/-   ##
=========================================
  Coverage     76.81%   76.81%           
  Complexity     1195     1195           
=========================================
  Files           226      226           
  Lines          5473     5473           
  Branches        443      443           
=========================================
  Hits           4204     4204           
  Misses          772      772           
  Partials        497      497           

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[wslulciuc]

Thanks, @perttus! 💯

[wslulciuc]

@perttus, the changes look great! I've approved the PR, but looks like you'll need to sign your commits (please checkout our CONTRIBUTING.md for more details)

[wslulciuc]

@perttus, need any guidance with the DCO check that's failing? Would be great to get this PR merged!

[perttus]

@perttus, need any guidance with the DCO check that's failing? Would be great to get this PR merged!

should be ok now

[boring-cyborg]

Great job! Congrats on your first merged pull request in the Marquez project!