Remove problematic dependency for ssi-build-all

[xlamorlette-datadog]

In the ssi-build-all, remove the dependency on build-nginx-rum-all, because this expands to 58 jobs, which is above the limit of 50.

This prevented the creation of the pipeline when pushing a tag (thus preventing the releasing process).

Removing this dependency is fine because the ssi-build-all job is part of the assemble stage, which is run after the build-all stage which contains the build-nginx-rum-all job.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.85%. Comparing base (4d8f170) to head (33032fe).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #338   +/-   ##
=======================================
  Coverage   68.85%   68.85%           
=======================================
  Files          56       56           
  Lines        7471     7471           
  Branches     1058     1058           
=======================================
  Hits         5144     5144           
  Misses       1820     1820           
  Partials      507      507           

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