[AIRFLOW-7061] Rename openfass to openfaas

[BasPH]

Encountered (what I think is) a typo; "openfaas" was spelled "openfass" in the new package structure.

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Issue link: AIRFLOW-7061

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[codecov-io]

Codecov Report

Merging #7721 into master will increase coverage by 22.21%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           master    #7721       +/-   ##
===========================================
+ Coverage   64.49%   86.70%   +22.21%     
===========================================
  Files         910      911        +1     
  Lines       44071    44084       +13     
===========================================
+ Hits        28422    38225     +9803     
+ Misses      15649     5859     -9790     

Impacted Files	Coverage Δ
airflow/providers/openfaas/hooks/openfaas.py	94.11% <ø> (ø)
airflow/contrib/hooks/openfaas_hook.py	100.00% <100.00%> (+100.00%)	⬆️
...w/providers/apache/hive/operators/mysql_to_hive.py	35.84% <0.00%> (-64.16%)	⬇️
airflow/providers/mysql/operators/mysql.py	55.00% <0.00%> (-45.00%)	⬇️
airflow/providers/apache/hive/hooks/hive.py	76.02% <0.00%> (-1.54%)	⬇️
airflow/utils/sqlalchemy.py	80.51% <0.00%> (-1.30%)	⬇️
airflow/bin/airflow	84.61% <0.00%> (ø)
airflow/providers/google/cloud/operators/vision.py	99.63% <0.00%> (+0.36%)	⬆️
...osoft/azure/operators/azure_container_instances.py	78.14% <0.00%> (+0.66%)	⬆️
airflow/providers/postgres/hooks/postgres.py	94.36% <0.00%> (+1.40%)	⬆️
... and 494 more

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[potiuk]

Openfass :) indeed, not the best name ....