feat(sdk): Add subtypes for Step, Wait, Callback and Invoke operations

[nvasiu]

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Issue Link, if available

#396

Description

Made sub-types mandatory for all operation types.

• Added new OperationSubType values for all operation types that were missing them (step, wait, callback and invoke).
• Updated OperationSubType values to now include their corresponding parent OperationType.
• OperationSubType is now a required argument for OperationIdentifier. OperationType is no longer passed, instead the type value is retrieved from the OperationSubType.

Updated all locations that create operations using OperationIdentifier, to now pass OperationSubType.

• DurableContextImpl (creates step, wait, invoke, callback, childContext, map, parallel, and waitForCondition operations)
• ConcurrencyOperation (creates child map and parallel operations)
• All related tests

Additional Changes:

WaitForConditionOperation was inconsistent with other operations because it created it's own OperationIdentifier within it's constructor.

• For all other operations, DurableContextImpl creates the OperationIdentifier and then passes it to the operation constructors.
• Updated WaitForConditionOperation to work in the same way.

Updated BaseDurableOperation to remove null checks on sub-type. since the sub-type is now required.

ChildContextOperation explicitly checks for unreachable subtypes. Updated ChildContextOperation to check for the new subtype values.

Updated LocalMemoryExecutionClient.applyResult to preserve subtype when updating an operation. Previously the subtype value was not passed on to the updated operation, causing test failures.

Demo/Screenshots

Checklist

• I have filled out every section of the PR template
• I have thoroughly tested this change

Testing

Unit Tests

Have unit tests been written for these changes? Updated Tests

Integration Tests

Have integration tests been written for these changes? Updated Tests

Examples

Has a new example been added for the change? (if applicable) N/A