Separate out tableau provider from salesforce

[potiuk]

Description

Tableau provider is currently embedded into Salesforce, but it should be removed to a separate 'tableau' provider.. This should lead to:

• 1.0.1 version of the Salesforce provider
• 1.0.0 version of the Tableau provider

Seems that Salesforce provider might be backwards-compatible with deprecation warnings:

• The Tableau classes from the Salesforce provider should be moved to Tableau
• The old Tableau classes in the Salesforce provider should get a deprecation warning and import the classes from the Tableau one
• The Salesforce provider should have a "hard" dependency on "tableau" provider (no extra needed)

Use case / motivation

Dicussion here has shown that the tableau provider is really independent from Salesforce and we have already similar examples (slack for example). Also it makes sense not to change provider structure when ownership of a service changes.

Related Issues

#13595

[jyotidhiman0610]

@potiuk can i take this up?

[potiuk]

Surely! Just be aware we are changing the documentation generation now to accomodate SEMVER versioning for providers #13767 so there will be slight changes in the files present in the "providers" folder (no README, CHANGELOG.rst for example). so you might want to wait a bit (Monday next week I hope) until that one is merged.

[anushkrishnav]

Can I work on this ?

[jyotidhiman0610]

@anushkrishnav I have already started on it, I am waiting for #13767 to proceed further :)

[anushkrishnav]

Okayy :)