Upgrade to Gradle 7

[rcoh]

Motivation and Context

• By upgrading to Gradle 7, we enable developers to use smithy-rs with new JDKs.
• Fixes gradle 7? #1167

Description

• remove a small number of deprecated gradle features
• run ./gradlew wrapper --version 7.4.2

Testing

• ran a build

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
• No codegen difference in the Server Test Python

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	-0.15%	35886.38	35940.17
Total requests	-0.14%	3231719	3236316
Total errors	NaN%	0	0
Total successes	-0.14%	3231719	3236316
Average latency ms	2.17%	0.94	0.92
Minimum latency ms	-33.33%	0.02	0.03
Maximum latency ms	36.37%	22.72	16.66
Stdev latency ms	14.75%	0.7	0.61
Transfer Mb	-0.14%	335.94	336.42
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]

LGTM!

[github-actions]

A new generated diff is ready to view.

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

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	17.29%	82779.94	70577.74
Total requests	17.26%	7455039	6357568
Total errors	NaN%	0	0
Total successes	17.26%	7455039	6357568
Average latency ms	100.00%	1.08	0.54
Minimum latency ms	0.00%	0.02	0.02
Maximum latency ms	17.05%	23.96	20.47
Stdev latency ms	188.24%	1.96	0.68
Transfer Mb	17.26%	774.96	660.87
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

[crisidev]

Very nice!

[github-actions]

A new generated diff is ready to view.

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

A new doc preview is ready to view.

[github-actions]

A new generated diff is ready to view.

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

A new doc preview is ready to view.