golangci-lint: enable usetesting linter - #53720

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [github.com/moby/moby/client](https://redirect.github.com/moby/moby) |
`v0.6.0` → `v0.6.2` |
![age](https://developer.mend.io/api/mc/badges/age/go/github.com%2fmoby%2fmoby%2fclient/v0.6.2?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/go/github.com%2fmoby%2fmoby%2fclient/v0.6.0/v0.6.2?slim=true)
|

---

### Release Notes

<details>
<summary>moby/moby (github.com/moby/moby/client)</summary>

###
[`v0.6.2`](https://redirect.github.com/moby/moby/releases/tag/client/v0.6.2)

[Compare
Source](https://redirect.github.com/moby/moby/compare/v0.6.1...v0.6.2)

#### 0.6.2

##### Changelog

- client: bump github.com/docker/go-connections v0.8.2,
github.com/Azure/go-ansiterm
[`8c912ac`](https://redirect.github.com/moby/moby/commit/8c912ac31dd4).
[moby/moby#53891](https://redirect.github.com/moby/moby/pull/53891)
- Fix request cancellation and deadlines during client HTTP upgrade
handshakes.
[moby/moby#53889](https://redirect.github.com/moby/moby/pull/53889)

###
[`v0.6.1`](https://redirect.github.com/moby/moby/releases/tag/client/v0.6.1)

[Compare
Source](https://redirect.github.com/moby/moby/compare/v0.6.0...v0.6.1)

#### 0.6.1

##### Changelog

- client: add `WithHTTPRequestHook` option.
[moby/moby#53671](https://redirect.github.com/moby/moby/pull/53671)
- client: deprecate `WithResponseHook` in favor of
`WithHTTPResponseHook`.
[moby/moby#53666](https://redirect.github.com/moby/moby/pull/53666)
- client: fix `WithHTTPResponseHook` hooks not being called for hijacked
HTTP connections.
[moby/moby#53821](https://redirect.github.com/moby/moby/pull/53821)
- client: postRaw: use consistent order or arguments.
[moby/moby#53677](https://redirect.github.com/moby/moby/pull/53677)
- client: prevent response hooks from consuming response body.
[moby/moby#53667](https://redirect.github.com/moby/moby/pull/53667)
- client: remove redundant cloning of response hooks.
[moby/moby#53822](https://redirect.github.com/moby/moby/pull/53822)
- client: update github.com/docker/go-connections v0.8.1.
[moby/moby#53708](https://redirect.github.com/moby/moby/pull/53708)
- golangci-lint: enable usetesting linter.
[moby/moby#53720](https://redirect.github.com/moby/moby/pull/53720)
- vendor: github.com/moby/moby/api v1.56.1.
[moby/moby#53837](https://redirect.github.com/moby/moby/pull/53837)

</details>

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