go: upgrade to 1.22

[bentranter]

Upgrades the GitHub CI workflows and go.mod entry for Go 1.22. Just in time for Go 1.23 to be released 😅

[gitguardian]

⚠️ GitGuardian has uncovered 5 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
9440732	Triggered	PostgreSQL Credentials	0d06b94	integration/database_connection_pool_test.go	View secret
9440732	Triggered	PostgreSQL Credentials	0d06b94	integration/database_connection_pool_test.go	View secret
9440732	Triggered	PostgreSQL Credentials	0d06b94	integration/database_connection_pool_test.go	View secret
9440732	Triggered	PostgreSQL Credentials	0d06b94	integration/database_connection_pool_test.go	View secret
9440732	Triggered	PostgreSQL Credentials	0d06b94	integration/database_connection_pool_test.go	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secret safely. Learn here the best practices.
3. Revoke and rotate this secret.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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^{🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.}

[bentranter]

When I click the GitGuardian ID it says, "not found", so I'm guessing this is getting falsely flagged from the change in #1557 prior to it being marked as a test value. Going to merge as-is and see if it's fine.