Remove the usage of deprecated TestConfig constructor

[0xnm]

What does this PR do?

These usages were added in #1996. This PR fixes that.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #1999 (26dd5af) into develop (86a9447) will increase coverage by 0.07%.
The diff coverage is n/a.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1999      +/-   ##
===========================================
+ Coverage    83.69%   83.76%   +0.07%     
===========================================
  Files          488      488              
  Lines        17743    17772      +29     
  Branches      2661     2666       +5     
===========================================
+ Hits         14849    14886      +37     
+ Misses        2174     2169       -5     
+ Partials       720      717       -3     

see 24 files with indirect coverage changes