[PR] Fix edge-case when conflicting constraints prevent k8s env creation [airflow]

["potiuk (via GitHub)" <gi...@apache.org>]

potiuk opened a new pull request, #43276:
URL: https://github.com/apache/airflow/pull/43276

   The #36930 added constraints to creation of k8s environment, but it had a side effect - the constraints could not be created if source of airflow had dependencies conflicting with constraints (which might happen for example when we upgrade FAB - because locally pinned FAB might be different than the one in constraints).
   
   Also the constraints were "hard-coded" - the python version, branch and github repository were hard-coded.
   
   This PR fixes both problems:
   
   * constraints URL is dynamically generated based on current branch, repo and python version
   * in case attempts to create the venv with constraints fails, we attempt to install it again without constraints
   
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Re: [PR] Fix edge-case when conflicting constraints prevent k8s env creation [airflow]

["potiuk (via GitHub)" <gi...@apache.org>]

potiuk merged PR #43276:
URL: https://github.com/apache/airflow/pull/43276


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