Rollup merge of #126059 - workingjubilee:stack-nothing-higher, r=ChrisDenton

Raise `DEFAULT_MIN_STACK_SIZE` to at least 64KiB

Prevent copy-paste errors from producing new starved-for-resources threaded platforms by raising `DEFAULT_MIN_STACK_SIZE` from 4096 bytes to at least 64KiB.

Two platforms "affected" by this have no actual threads:
- UEFI
- "unsupported"

Platforms that this actually affects:
- wasm32-wasi with "atomics" enabled
- wasm32-wasi-p1-threads

Two exceptions:
- SGX: a "secure code execution" platform, stays at 4096B
- TEEOS: also a "secure code execution" platform, stays at 8192B

I believe either of these may have sufficiently "interesting" semantics around threads, or significant external library support. Either would mean making any choices here for them is suspect.

Fixes #126027 which is a bug report about `DEFAULT_MIN_STACK_SIZE` being too low on wasi.

Author: workingjubilee