[AIRFLOW-7054] Breeze has an option now to reset db at entry

[potiuk]

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Issue link: AIRFLOW-7054

Make sure to mark the boxes below before creating PR: [x]

• Description above provides context of the change
• Commit message/PR title starts with [AIRFLOW-NNNN]. AIRFLOW-NNNN = JIRA ID^*
• Unit tests coverage for changes (not needed for documentation changes)
• Commits follow "How to write a good git commit message"
• Relevant documentation is updated including usage instructions.
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^* For document-only changes commit message can start with [AIRFLOW-XXXX].

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In case of fundamental code change, Airflow Improvement Proposal (AIP) is needed.
In case of a new dependency, check compliance with the ASF 3rd Party License Policy.
In case of backwards incompatible changes please leave a note in UPDATING.md.
Read the Pull Request Guidelines for more information.

[kaxil]

CI Fails with:

/opt/airflow/scripts/ci/in_container/check_environment.sh: line 203: DB_RESET: unbound variable

[potiuk]

CI Fails with:

/opt/airflow/scripts/ci/in_container/check_environment.sh: line 203: DB_RESET: unbound variable

Not any more :)

[codecov-io]

Codecov Report

Merging #7710 into master will decrease coverage by 0.49%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #7710      +/-   ##
==========================================
- Coverage   86.90%   86.41%   -0.50%     
==========================================
  Files         906      906              
  Lines       43800    43927     +127     
==========================================
- Hits        38065    37958     -107     
- Misses       5735     5969     +234     

Impacted Files	Coverage Δ
...flow/providers/apache/cassandra/hooks/cassandra.py	21.51% <0.00%> (-72.16%)	⬇️
airflow/providers/postgres/operators/postgres.py	50.00% <0.00%> (-50.00%)	⬇️
airflow/providers/redis/operators/redis_publish.py	50.00% <0.00%> (-50.00%)	⬇️
airflow/providers/mongo/sensors/mongo.py	53.33% <0.00%> (-46.67%)	⬇️
airflow/providers/redis/sensors/redis_key.py	61.53% <0.00%> (-38.47%)	⬇️
airflow/executors/celery_executor.py	50.67% <0.00%> (-37.84%)	⬇️
...roviders/google/cloud/operators/postgres_to_gcs.py	52.94% <0.00%> (-32.36%)	⬇️
airflow/providers/amazon/aws/hooks/base_aws.py	59.41% <0.00%> (-17.90%)	⬇️
airflow/providers/postgres/hooks/postgres.py	78.87% <0.00%> (-15.50%)	⬇️
airflow/utils/process_utils.py	73.25% <0.00%> (-12.80%)	⬇️
... and 10 more

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[potiuk]

I forgot to add help explanation. Added now.