RFR: 8367149: Add ergonomic construction for creating ad-hoc VMErrorCallback [v3]

[Axel Boldt-Christmas]

> Add a class OnVMError which uses the VMErrorCallback mechanism which is an ergonomic construction for creating ad-hoc VMErrorCallback which automatically calls the provided invocable f if a VM crash occurs within its lifetime. Can be used to instrument a build for more detailed contextual information gathering. Especially useful when hunting down intermittent bugs, or issues only reproducible in environments where access to a debugger is not readily available. Example use:
> ```C++
>   {
>     // Note the lambda is invoked after an error occurs within this thread,
>     // and during on_error's lifetime. If state prior to the crash is required,
>     // capture a copy of it first.
>     auto important_value = get_the_value();
> 
>     OnVMError on_error([&](outputStream* st) {
>       // Dump the important bits.
>       st->print("Prior value: ");
>       important_value.print_on(st);
>       st->print("During crash: ")
>       get_the_value().print_on(st);
>       // Dump whole the whole state.
>       this->print_on(st);
>     });
> 
>     // Sometimes doing a thing will crash the VM.
>     do_a_thing();
>   }
> 
> 
> C++17 class template argument deduction finally makes these sort of constructions ergonomic to use without the need for auto and helper construction methods.

Axel Boldt-Christmas has updated the pull request incrementally with one additional commit since the last revision:

  Replace ergonomic with convenient

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/27159/files
  - new: https://git.openjdk.org/jdk/pull/27159/files/a4fb3397..c6e6ce91

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27159&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27159&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27159.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27159/head:pull/27159

PR: https://git.openjdk.org/jdk/pull/27159