Remove old plan generation APIs

[jingtang10]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

Description
Delete deprecated old plan generation APIs in favour of new ones with optional parameters. This makes updating to the latest version of CQL stack easier.

Deprecated APIs to delete:

FhirOperator.generateCarePlan(String,String): IBaseResource
FhirOperator.generateCarePlan(String,String,String): IBaseResource
FhirOperator.generateCarePlan(CanonicalType,String,String? = null,String? = null,String? = null,IBaseDatatype? = null,IBaseDatatype? = null,IBaseDatatype? = null,IBaseDatatype? = null,IBaseDatatype? = null,IBaseParameters? = null,Boolean? = null,IBaseBundle? = null,IBaseParameters? = null): IBaseResource

All merged into the same API.

Alternative(s) considered
Have you considered any alternatives? And if so, why have you chosen the approach in this PR?

Type
Choose one: Code health

Screenshots (if applicable)

Checklist

• I have read and acknowledged the Code of conduct.
• I have read the Contributing page.
• I have signed the Google Individual CLA, or I am covered by my company's Corporate CLA.
• I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
• I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project.
• I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally.
• I have built and run the demo app(s) to verify my change fixes the issue and/or does not break the demo app(s).

[MJ1998]

By "deprecate" do you mean remove ? The deprecated APIs are being removed. Is that intended ?

[aditya-07]

lgtm