implemented buildMap todo for kotlin

[Dmitry-Borodin]

there was todo to use buildMap, it is stable since Kotlin 1.6
implemented todo

note - I was not able to run tests from doker image with

error: failed to open: /mounted_workdir/target/debug/.cargo-lock
Caused by:
  Permission denied (os error 13)

But I hope they will run in PR flow now.

[jmartinesp]

There is a buildMap variant that takes a capacity parameter and should be more performant, maybe the len value could be used for that?

val len = buf.getInt()
return buildMap<{{ key_type_name }}, {{ value_type_name }}>(len) {

[Dmitry-Borodin]

Thank you, didn't notice that. Fixed.

[Dmitry-Borodin]

build failing because of rust dependencies

error: package `clap_derive v4.4.0` cannot be built because it requires rustc 1.70.0 or newer, while the currently active rustc version is 1.69.0
Either upgrade to rustc 1.70.0 or newer, or use
cargo update -p [email protected] --precise ver
where `ver` is the latest version of `clap_derive` supporting rustc 1.69.0

[badboy]

If you rebase on main CI will pass (#1720 landed)

[bendk]

CI is passing, let's take this.