[AIRFLOW-4095] Add template_fields for S3CopyObjectOperator & S3DeleteObjectsOperator

[yaswanthrajyadiki]

Make sure you have checked all steps below.

Jira

• My PR addresses the following Airflow 4095 issue

Description

Added below attributes as template_fields, now those params will accept Jinja template and values will changes in run time

S3DeleteObjectsOperator

1. keys
2. bucket

S3CopyObjectOperator

1. source_bucket_key
2. dest_bucket_key
3. source_bucket_name
4. dest_bucket_name

Commits

• My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Documentation

• In case of new functionality, my PR adds documentation that describes how to use it.
  • When adding new operators/hooks/sensors, the autoclass documentation generation needs to be added.
  • All the public functions and the classes in the PR contain docstrings that explain what it does
  • If you implement backwards incompatible changes, please leave a note in the Updating.md so we can assign it to a appropriate release

Code Quality

• Passes flake8

[XD-DENG]

Restarted a few failing CI tests, which may be due to transient error.

[codecov-io]

Codecov Report

Merging #4920 into master will increase coverage by 1.39%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4920      +/-   ##
==========================================
+ Coverage   75.57%   76.96%   +1.39%     
==========================================
  Files         454      454              
  Lines       29159    31768    +2609     
==========================================
+ Hits        22036    24450    +2414     
- Misses       7123     7318     +195

Impacted Files	Coverage Δ
...rflow/contrib/operators/s3_copy_object_operator.py	100% <100%> (ø)	⬆️
...ow/contrib/operators/s3_delete_objects_operator.py	90.47% <100%> (+0.47%)	⬆️
airflow/operators/dagrun_operator.py	91.11% <0%> (-3.63%)	⬇️
airflow/contrib/utils/gcp_field_sanitizer.py	90% <0%> (-0.91%)	⬇️
airflow/operators/dummy_operator.py	100% <0%> (ø)	⬆️
airflow/contrib/operators/gcs_list_operator.py	100% <0%> (ø)	⬆️
airflow/contrib/operators/adls_list_operator.py	100% <0%> (ø)	⬆️
airflow/utils/weight_rule.py	100% <0%> (ø)	⬆️
airflow/utils/trigger_rule.py	100% <0%> (ø)	⬆️
airflow/contrib/operators/s3_list_operator.py	100% <0%> (ø)	⬆️
... and 31 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 419e301...443b648. Read the comment docs.

[XD-DENG]

Thanks @yaswanthrajyadiki

[XD-DENG]

Hi @ashb , this PR is an enhancement on #3823.

#3823 (https://issues.apache.org/jira/browse/AIRFLOW-2985) is already labelled with fix version 1.10.3. So I have labelled this PR with fix version 1.10.3 as well. FYI.