OCPBUGS-51746: Bump golang x/oauth2 to fix CVE-2025-22868

[aman4433]

A flaw was found in golang.org/x/oauth2. Due to this an attacker can pass a malicious malformed token which causes unexpected memory to be consumed during parsing.

To address this issue, we have upgraded the library to version v0.28.0, which includes a fix for the vulnerability.

Affected Library: golang.org/x/oauth2
Current Version: v0.14.0
Fixed Version: v0.28.0

[openshift-ci-robot]

@aman4433: This pull request references Jira Issue OCPBUGS-51746, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected Jira Issue OCPBUGS-51746 to depend on a bug targeting a version in 4.17.0, 4.17.z and in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but no dependents were found

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

A flaw was found in golang.org/x/oauth2. Due to this an attacker can pass a malicious malformed token which causes unexpected memory to be consumed during parsing.

To address this issue, we have upgraded the library to version v0.28.0, which includes a fix for the vulnerability.

Affected Library: golang.org/x/oauth2
Current Version: v0.14.0
Fixed Version: v0.28.0

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.