Proposal: get rid of nightly features in gstd

[StackOverflowExcept1on]

Problem to Solve

Do we need nightly features in gstd at all?

1. Once we merge new allocations and set memory limits to 4GB  #3472, out of memory errors will become very rare, so there is no point in feature(alloc_error_handler)

2. Regarding the feature(panic_info_message): core::panic::PanicInfo implements Display and will format the panic message: panicked at {file}:{line}:{column}:\n{msg}

   Current implementation of gstd uses custom format: '{msg}', {file}:{line}:{column}. Should we use #[feature(panic_info_message)] just to implement a custom format of panic message? I think we can parse the String in a standard format and convert it to a custom format instead of requiring nightly toolchain.

Possible Solution

1. Convert the output of <core::panic::PanicInfo as Display> to our custom format.
   It's probably easy, but it's worth considering Rust <1.73:
   Change default panic handler message format. rust-lang/rust#112849

   Discussed:

   • debug feature: Display as is
   • no debug feature: get message from Display, w/o location

2. Make our custom format obsolete

Notes

No response