Use makeParser from amrex::ParmParse

[AlexanderSinn]

This PR replaces initParser with amrex::ParmParse::makeParser. The main difference is that the amrex version allows referencing different input parameters in addition to my_constants.

hipace.normalized_units = 1
electron.charge = if(hipace.normalized_units, 1, -q_e)

Additionally, IParser is now used for bool, int and Long like in amrex instead of the double Parser.

This PR however keeps the parsing function for vector/array types as they are stricter than the amrex versions (e.g. if 3 parameters are required the amrex ones would not give an error if 4+ are provided).

• [ ] Small enough (< few 100s of lines), otherwise it should probably be split into smaller PRs
• [ ] Tested (describe the tests in the PR description)
• [ ] Runs on GPU (basic: the code compiles and run well with the new module)
• [ ] Contains an automated test (checksum and/or comparison with theory)
• [ ] Documented: all elements (classes and their members, functions, namespaces, etc.) are documented
• [ ] Constified (All that can be const is const)
• [ ] Code is clean (no unwanted comments, )
• [ ] Style and code conventions are respected at the bottom of https://github.com/Hi-PACE/hipace
• [ ] Proper label and GitHub project, if applicable

[MaxThevenet]

Thanks for this PR! Could you give an example for this statement (just in the PR description)?

The main difference is that the amrex version allows referencing different input parameters in addition to my_constants.