[AIRFLOW-6102] [AIP-21] Rename Dataproc operators

[michalslowikowski00]

PR contains changes regarding AIP-21 (renaming GCP operators and hooks):

• renamed GCP modules
• adde deprecation warnings to the contrib modules
• fixed tests
• updated UPDATING.md

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Issue link: AIRFLOW-6102

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• 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.

[codecov-io]

Codecov Report

Merging #7151 into master will decrease coverage by 0.24%.
The diff coverage is 96.87%.

@@            Coverage Diff             @@
##           master    #7151      +/-   ##
==========================================
- Coverage   85.28%   85.03%   -0.25%     
==========================================
  Files         707      707              
  Lines       39255    39347      +92     
==========================================
- Hits        33478    33459      -19     
- Misses       5777     5888     +111

Impacted Files	Coverage Δ
...ders/google/cloud/example_dags/example_dataproc.py	0% <0%> (ø)	⬆️
...rflow/providers/google/cloud/operators/dataproc.py	88.13% <100%> (ø)	⬆️
airflow/contrib/hooks/gcp_dataproc_hook.py	100% <100%> (ø)	⬆️
airflow/contrib/operators/dataproc_operator.py	100% <100%> (ø)	⬆️
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
airflow/kubernetes/pod_launcher.py	45.25% <0%> (-46.72%)	⬇️
airflow/kubernetes/refresh_config.py	50.98% <0%> (-23.53%)	⬇️
...rflow/contrib/operators/kubernetes_pod_operator.py	78.31% <0%> (-20.49%)	⬇️
airflow/contrib/operators/gcs_list_operator.py	100% <0%> (ø)	⬆️
... and 8 more

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[turbaszek]

I think there's no need to change names in SubmitXJob operators because those are deperecated anyway by DataprocSubmitJobOperator. WDYT @mik-laj ?

[mik-laj]

This may not be needed, but it is already done and standardizes our code. In my opinion, this is a positive change. We don't need to revert it. Let's go with it.