…e-proxy to v0.2.4 (#2019)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/googleapis/enterprise-certificate-proxy](https://togithub.com/googleapis/enterprise-certificate-proxy) | require | patch | `v0.2.3` -> `v0.2.4` |

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### Release Notes

<details>
<summary>googleapis/enterprise-certificate-proxy</summary>

### [`v0.2.4`](https://togithub.com/googleapis/enterprise-certificate-proxy/releases/tag/v0.2.4): Post-GA Release

[Compare Source](https://togithub.com/googleapis/enterprise-certificate-proxy/compare/v0.2.3...v0.2.4)

-   Adds darwin-specific client to access keychain APIs directly, bypassing RPC-mechanism of universal client.
-   Minor update to sub-process management for Windows signer implementation - relies on OS for process clean-up instead of PID.

</details>

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## [0.127.0](https://togithub.com/googleapis/google-api-go-client/compare/v0.126.0...v0.127.0) (2023-06-12)


### Features

* **all:** Auto-regenerate discovery clients ([#2015](https://togithub.com/googleapis/google-api-go-client/issues/2015)) ([21af27f](https://togithub.com/googleapis/google-api-go-client/commit/21af27f16f65cdde5019e904a7f7fe67fc118dc1))
* **all:** Auto-regenerate discovery clients ([#2017](https://togithub.com/googleapis/google-api-go-client/issues/2017)) ([4c6e7c1](https://togithub.com/googleapis/google-api-go-client/commit/4c6e7c17ea4f5010c429638d6d0e007f45b09162))
* **all:** Auto-regenerate discovery clients ([#2018](https://togithub.com/googleapis/google-api-go-client/issues/2018)) ([c86a815](https://togithub.com/googleapis/google-api-go-client/commit/c86a8157d883e8cc0fb86669a111dd54656b24ac))
* **all:** Auto-regenerate discovery clients ([#2021](https://togithub.com/googleapis/google-api-go-client/issues/2021)) ([eb914ce](https://togithub.com/googleapis/google-api-go-client/commit/eb914ce613c6930b6908546e562090d4e30f879d))

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