* seal_call_code implementation
- tests
- benchmark
* Addressing @xgreenx's comments
* Fix test-linux-stable-int
* Rename seal_call_code to seal_delegate_call
* Pass value unchanged into lib contract
* Address @athei's comments
- whitespace .wat issues
- wrong/missing .wat comments
- redundant .wat calls/declarations
- change order of functions (seal_delegate_call right after seal_call)
in decls, tests, benchmark
- fix comments, move doc comments to enum variants
- remove unnecessary empty lines
- rename runtime cost DelegateCall to DelegateCallBase
- do not set CallFlags::ALLOW_REENTRY for delegate_call
* Do not pass CallFlags::ALLOWS_REENTRY for delegate_call
* Update comment for seal_delegate_call and CallFlags
* Addressing @athei's comments (minor)
* Allow reentry for a new frame after delegate_call (revert)
* Same seal_caller and seal_value_transferred for lib contract
- test
- refactor frame args due to review
- logic for seal_caller (please review)
* Put caller on frame for delegate_call, minor fixes
* Update comment for delegate_call
* Addressing @athei's comments
* Update weights generated by benchmark
* Improve comments
* Address @HCastano's comments
* Update weights, thanks @joao-paulo-parity
* Improve InvalidCallFlags error comment
Yarik Bratashchuk