PVF: instantiate runtime from bytes

[mrcnski]

ISSUE

Overview

Create the runtime from artifact bytes instead of a file using create_runtime_from_artifact_bytes.

This is a prerequisite for #7243 to be able to lock down filesystem access for PVF threads.

Performance Note

This should not affect performance for Linux, but instantiation will be slower on Mac:

/// * Linux - this feature is supported for all instances of [`Module`].
///   Modules backed by an existing mmap (such as those created by
///   [`Module::deserialize_file`]) will reuse that mmap to cow-initialize
///   memory. Other instance of [`Module`] may use the `memfd_create`
///   syscall to create an initialization image to `mmap`.
/// * Unix (not Linux) - this feature is only supported when loading modules
///   from a precompiled file via [`Module::deserialize_file`] where there
///   is a file descriptor to use to map data into the process. Note that
///   the module must have been compiled with this setting enabled as well.

Benchmarks comparing without and with CoW:

dirty_1mb_of_memory_from_kusama_runtime_with_pooling_vanilla_precompiled_on_1_threads
                        time:   [115.87 µs 116.94 µs 118.24 µs]
dirty_1mb_of_memory_from_kusama_runtime_with_pooling_vanilla_precompiled_on_2_threads
                        time:   [184.43 µs 185.03 µs 185.63 µs]
dirty_1mb_of_memory_from_kusama_runtime_with_pooling_vanilla_precompiled_on_4_threads
                        time:   [312.80 µs 314.64 µs 316.68 µs]
dirty_1mb_of_memory_from_kusama_runtime_with_pooling_vanilla_precompiled_on_8_threads
                        time:   [724.69 µs 729.18 µs 733.92 µs]

dirty_1mb_of_memory_from_kusama_runtime_with_pooling_cow_precompiled_on_1_threads
                        time:   [79.791 µs 80.350 µs 81.036 µs]
dirty_1mb_of_memory_from_kusama_runtime_with_pooling_cow_precompiled_on_2_threads
                        time:   [98.265 µs 98.738 µs 99.264 µs]
dirty_1mb_of_memory_from_kusama_runtime_with_pooling_cow_precompiled_on_4_threads
                        time:   [135.45 µs 137.78 µs 140.80 µs]
dirty_1mb_of_memory_from_kusama_runtime_with_pooling_cow_precompiled_on_8_threads
                        time:   [536.39 µs 540.40 µs 544.44 µs]