update: MSRV from 1.56.1 to 1.58.1

[Velfi]

Motivation and Context

#1318

Description

This PR bumps the SDK's MSRV from 1.56.1 to 1.58.1 per our MSRV "2 versions behind" policy. It also fixes many issues highlighted by the latest clippy lints.

Testing

ran existing tests

Checklist

• I have updated CHANGELOG.next.toml if I made changes to the smithy-rs codegen or runtime crates
• I have updated CHANGELOG.next.toml if I made changes to the AWS SDK, generated SDK code, or SDK runtime crates

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• No codegen difference in the Server Test

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	-3.53%	71977.68	74608.21
Total requests	-3.52%	6484234	6720710
Total errors	NaN%	0	0
Total successes	-3.52%	6484234	6720710
Average latency ms	10.62%	1.25	1.13
Minimum latency ms	100.00%	0.02	0.01
Maximum latency ms	-20.01%	23.54	29.43
Stdev latency ms	5.50%	2.11	2
Transfer Mb	-3.52%	674.04	698.62
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• No codegen difference in the Server Test

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	-0.17%	77906.42	78035.72
Total requests	-0.08%	7019223	7024861
Total errors	NaN%	0	0
Total successes	-0.08%	7019223	7024861
Average latency ms	-4.10%	1.17	1.22
Minimum latency ms	0.00%	0.02	0.02
Maximum latency ms	-1.67%	23.55	23.95
Stdev latency ms	-5.71%	1.98	2.1
Transfer Mb	-0.08%	729.65	730.24
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0

[jdisanti]

How big is it?

[Velfi]

432 bytes, the next largest is 56 bytes. Clippy recommends boxing it.

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• No codegen difference in the Server Test

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	6.53%	68549.29	64348.73
Total requests	6.51%	6172636	5795365
Total errors	NaN%	0	0
Total successes	6.51%	6172636	5795365
Average latency ms	-3.51%	0.55	0.57
Minimum latency ms	-50.00%	0.01	0.02
Maximum latency ms	-13.42%	18.58	21.46
Stdev latency ms	4.29%	0.73	0.7
Transfer Mb	6.51%	641.65	602.43
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0