Control Delta allocation to be separate from storage

[Ignition]

Description

• Change PropertyValue's map from std::map -> boost::container::flat_map
• Template PropertyValue to take an allocator
• Custom delta container to ensure allocations exist separate to storage allocations

related to #1685

Using this benchmark
FOREACH (i in range(1, 3000000) | CREATE (:Label1:Label2:Label3:Label4:Label5:Label6));

RSS is now

IN_MEMORY_TRANSACTIONAL ~575MiB
IN_MEMORY_ANALYTICAL    ~560MiB

[master < Task] PR

• Provide the full content or a guide for the final git message
  • Explicit control over delta allocations

Documentation checklist

• Add the documentation label tag
• Add the bug / feature label tag
• Add the milestone for which this feature is intended
  • If not known, set for a later milestone
• Write a release note, including added/changed clauses
  • [Release note text]
• Link the documentation PR here
  • [Documentation PR link]
• Tag someone from docs team in the comments

[antoniofilipovic]

Really great job, I don't have much comments but few suggestions

[antoniofilipovic]

Awesome job!

[sonarcloud]

Quality Gate passed

Issues
39 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.9% Duplication on New Code

See analysis details on SonarCloud