Fixing the broken and flaky playwright tests

[ghost]

Description

• Adding waits for correct elements on data model page to ensure the upload and creation of data models are done correctly. This might solve the flaky tests on data model page.

Related Issue(s)

• This PR

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

[lassopicasso]

Nice! 🚀

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5be613e) 86.63% compared to head (7519800) 86.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12360   +/-   ##
=======================================
  Coverage   86.63%   86.63%           
=======================================
  Files        1199     1199           
  Lines       18054    18054           
  Branches     2286     2286           
=======================================
  Hits        15641    15641           
  Misses       2129     2129           
  Partials      284      284           

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