[AIRFLOW-6588] write_stdout and json_format are boolean

[pingzh]

as you can see in the https://github.com/apache/airflow/blob/master/airflow/utils/log/es_task_handler.py#L221
https://github.com/apache/airflow/blob/master/airflow/utils/log/es_task_handler.py#L210

Those args have to be boolean

---

Issue link: AIRFLOW-6588

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.
• I will engage committers as explained in Contribution Workflow Example.

^* For document-only changes commit message can start with [AIRFLOW-XXXX].

---

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.

[potiuk]

Some static checks are failing :(

[kaxil]

You will have to update the following line too:

airflow/airflow/config_templates/airflow_local_settings.py

Line 207 in 5b44c0f

ELASTIC_REMOTE_HANDLERS: Dict[str, Dict[str, str]] = {

[pingzh]

Updated

[codecov-io]

Codecov Report

Merging #7199 into master will decrease coverage by 0.17%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #7199      +/-   ##
==========================================
- Coverage   85.41%   85.23%   -0.18%     
==========================================
  Files         753      758       +5     
  Lines       39685    39932     +247     
==========================================
+ Hits        33898    34038     +140     
- Misses       5787     5894     +107

Impacted Files	Coverage Δ
airflow/config_templates/airflow_local_settings.py	71.73% <0%> (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	76.47% <0%> (-21.18%)	⬇️
airflow/providers/amazon/aws/sensors/emr_base.py	91.66% <0%> (-8.34%)	⬇️
airflow/api/client/local_client.py	92% <0%> (-8%)	⬇️
airflow/api/client/api_client.py	63.15% <0%> (-1.55%)	⬇️
airflow/gcp/hooks/dataflow.py	88.37% <0%> (-0.92%)	⬇️
... and 25 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 5abce47...ba35b8e. Read the comment docs.