[C++]: Fix incorrect use of `noexcept` specifier

[satoshiotomakan]

Describe the bug
WC makes the end-user app crashing because of the incorrect use of C++ noexcept specifier which ignores throw exceptions.

To Reproduce
For example, pass an incorrect EOS signature:

wallet-core/src/EOS/Signer.cpp

Line 149 in b2749b2

tx.signatures.emplace_back(Signature(signature, type));

Expected behavior
WC should either throw an exception or return an error in SigningOutput { error, error_message } Protobuf message.

[ngqinzhe]

can I try this? is this issue specifically targeting EOS?

[Vvipp4535]

Will this affect any core