[FunC] Add more tests for try/catch

[tolk-vm]

After fixing a bug with c1/c3 registers in #1332, cover an issue with tests.

Note, that there is such an example of unexpected try/catch behavior:

some_var = 0;
try {
    some_var = 999;
    call_function_that_throws();
} catch {
}
// here some_var is 0! not 999

Regardless of assignment, an exception restores all variables to their previous values. It's very unexpected, but it's how TVM works, not a bug. Probably, to be considered as a matter of TVM modification some day.