C++/Java/C# Shared Range Analysis: BigInt rewrite experiment

[d10c]

This PR use BigInt as the Delta type everywhere in the shared range analysis library.

Shared commit:

• shared/rangeanalysis: use BigInt as the Delta type everywhere

C++ commits:

• cpp/ql/lib: rewrite shared range analysis library to use BigInts
• cpp/ql/src: update queries
• cpp/ql/test: update tests

Java commits:

• java/ql/lib: update shared range analysis library to use BigInts
• java/ql/src: update queries
• java/ql/test: update library-tests

C# commits:

• csharp/ql/lib: update shared rangeanalysis library to use BigInts
• csharp/ql/test: update ModulusAnalysis test to use BigInt