Delayed Settlement Cash Not Freed for Removed Assets

[jhonabreul]

Description

Using DelayedSettlementModel and when manually removing option contracts with existing positions open, they get liquidated, the security is removed making the DataManager not able to scan its settlement model to apply the unsettled funds on the settlement date.

With this changes we delay the security removal just like we do with those that have open orders or positions, but for when they have unsettled funds.

Related Issue

Closes #7716

Motivation and Context

Requires Documentation Change

How Has This Been Tested?

• Unit tests
• Regression algorithm

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Refactor (non-breaking change which improves implementation)
• Performance (non-breaking change which improves performance. Please add associated performance test and results)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Non-functional change (xml comments/documentation/etc)

Checklist:

• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My branch follows the naming convention bug-<issue#>-<description> or feature-<issue#>-<description>