Adding JWT, IP filtering, and direct session login support for SalesforceHook

[josh-fell]

Closes: #17192

• Adding login and authentication support when using the SalesforceHook:

  • JWT bearer authentication
  • IP filtering (allow-listing)
  • Direct session/instance access

• New fields were also added to the connection form for the "Salesforce" type:
  

• Connection documentation has also been updated to describe each connection field and what type of login/authentication is related.

• Refactored unit tests to include mock implementations of the 4 supported auth/login types.

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[josh-fell]

@eladkal FYI if you'd like to review.

[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.