Changed the imports to the new sdk for the connection class in base secret manager

[arorasachin9]

In AWS Secret Manager provider we are inheriting from the BaseSecretManager class which is still using older import leading to
WARNING Using Connection.from_json from airflow.models is deprecated.Please use from_json on Connection from sdk(airflow.sdk.Connection) instead
So moved the import from the new sdk which will remove the WARNING message of deprecated import. I have added try catch to keep the backward compatibility which can be removed once we deprecate the older classes.
SS for previous output:

SS for new output:

[arorasachin9]

Are we not supposed to import the sdk imports in the core folder
The static check is failing

Check for SDK imports in core files..............................................Failed

• hook id: check-sdk-imports

• exit code: 1

  src/airflow/secrets/base_secrets.py:
  Line 25: from airflow.sdk import Connection
  Line 67: from airflow.sdk import Connection

  Found 2 SDK import(s) in core files

If we are not supposed to do so any suggested workaround for this warning or we have to move this class also in airflow sdk.
If we can update in core only then I'll fix the other failing test cases.

@dstandish @ashb

[shahar1]

It seems that it's not straight forward :(

[amoghrajesh]

@arorasachin9 thanks for trying this one out, this is already part of a bigger effort here: secrets backend is being reworked in the sense that it is being moved to shared library at the moment: #58621, the advantage of that is, it will dynamically detect the context it is run in - server (scheduler, api server) and client (worker, dag processor, triggerer) and grok the class automatically.

[amoghrajesh]

Requesting changes to avoid accidental merge, check my comment above

[arorasachin9]

NA