checker: add error message call stack support

[kbkpbot]

Feature request by #16127, #24575

Currently, support $compile_error() and $tmpl call stack showing in error message:

vlib/v/checker/tests/compile_error_call_position.vv:5:3: error: son only taken int as input
    3 | fn son[T](val T) {
    4 |     $if T !is int {
    5 |         $compile_error('son only taken int as input')
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    6 |     }
    7 | }
called from vlib/v/checker/tests/compile_error_call_position.vv:10:2
    8 |
    9 | fn main() {
   10 |     son(false)
      |     ~~~~~~~~~~
   11 | }

template_call_position_test.txt:11:2: error: undefined ident: `unknown_var` (veb action: main__main)
called from vlib/v/checker/tests/template_call_position.vv:4:2
    2 |
    3 | fn main() {
    4 |     $tmpl('template_call_position_test.txt')
      |     ^
    5 | }
template_call_position_test.txt:11:2: error: expression does not return a value (veb action: main__main)
called from vlib/v/checker/tests/template_call_position.vv:4:2
    2 |
    3 | fn main() {
    4 |     $tmpl('template_call_position_test.txt')
      |     ^
    5 | }

[spytheman]

Excellent work.

Can this be extended in the future, to show the callstack for errors, that happen in nested generic calls like in x.json2 ?

[spytheman]

For example, I tried to update https://github.com/herudi/cdv to work with latest V a few days ago, but got:

with no easy way to know what and where was the original call that triggered each x.json2 error ...

[kbkpbot]

Excellent work.

Can this be extended in the future, to show the callstack for errors, that happen in nested generic calls like in x.json2 ?

I think we can try.
I need a testcase to try. :)