Replace serde_json with simd_json

[luizirber]

I found out the simd-json crate supports the same interface as serde_json, so it is an easy swap for potentially much better perf.

Drawbacks are only supported on x86_64, so need to keep serde_json for all other archs. this is now supported on ARM and wasm too, with (slower) fallbacks when conditions are not met.

This PR also shows how spread the use of serde_json::from_reader across the codebase is, should probably consolidate into a method on signatures... rebased on top of #3443, which greatly limited changes

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.39%. Comparing base (b69c960) to head (a35e64b).

Files with missing lines	Patch %	Lines
src/core/src/signature.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           latest    #3174   +/-   ##
=======================================
  Coverage   86.38%   86.39%           
=======================================
  Files         137      137           
  Lines       16125    16133    +8     
  Branches     2219     2219           
=======================================
+ Hits        13930    13938    +8     
  Misses       1888     1888           
  Partials      307      307           

Flag	Coverage Δ
hypothesis-py	25.43% <ø> (ø)
python	92.40% <ø> (ø)
rust	62.18% <85.71%> (+0.09%)	⬆️

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[luizirber]

Tried out with a big signature (1.3GB compressed):

5m34s -> 3m29s
14.2 GB -> 23.3 GB

Tradeoffs, tradeoffs... =]

---

This PR:

        Command being timed: "sourmash sig describe /data/wort/wort-sra/sigs/SRR21113408.sig"
        User time (seconds): 160.24
        System time (seconds): 50.81
        Percent of CPU this job got: 100%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 3:29.01
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 23327760
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 359
        Minor (reclaiming a frame) page faults: 25031343
        Voluntary context switches: 64
        Involuntary context switches: 2786
        Swaps: 0
        File system inputs: 2566414
        File system outputs: 22
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0

latest:

        Command being timed: "sourmash sig describe /data/wort/wort-sra/sigs/SRR21113408.sig"
        User time (seconds): 292.09
        System time (seconds): 43.21
        Percent of CPU this job got: 100%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 5:34.15
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 14223848
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 4812
        Minor (reclaiming a frame) page faults: 20088817
        Voluntary context switches: 1282
        Involuntary context switches: 3187
        Swaps: 0
        File system inputs: 5159955
        File system outputs: 22
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0