Crossgen2 pipeline optimize (#51154)

Crossgen2 pipeline optimize (#51154)

* Initial implementation of crossgen2 pipeline mode

- Add --out-near-input option, which adds .ni. suffix to input filepath
  and stores resulting ni.dll near original dll. In this mode --out option can be skipped.
- Add --single-file-compilation mode, which allows to compile all input files separately.

* [crossgen2] Optimize pipeline mode

Load input and reference modules only once by crossgen2 start.

Signed-off-by: Timur Mustafin <t.mustafin@partner.samsung.com>
* Feedback: make typeSystemContext with opened files

Construct new typeSystemContext with already opened PEReaders and PDBReaders.

Signed-off-by: Timur Mustafin <t.mustafin@partner.samsung.com>
Co-authored-by: Gleb Balykov <g.balykov@samsung.com>