fix(deps): update module golang.org/x/sync to v0.15.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
golang.org/x/sync	v0.14.0 -> v0.15.0

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Summary by Sourcery

Update golang.org/x/sync dependency to v0.15.0 and refresh go.sum and vendor files

Chores:

• Bump golang.org/x/sync from v0.14.0 to v0.15.0 in go.mod
• Regenerate go.sum and update vendor modules

[sourcery-ai]

Reviewer's Guide

Upgrade golang.org/x/sync dependency to v0.15.0 by bumping the version, updating checksums, and refreshing vendored sources.

File-Level Changes

Change	Details	Files
Bump golang.org/x/sync to v0.15.0	Updated the require directive for x/sync to v0.15.0	go.mod
Refresh checksum entries	Regenerated and updated checksums for the new module version	go.sum
Sync vendored x/sync sources	Updated vendored errgroup implementation to match v0.15.0 Regenerated vendor/modules.txt to record new version	vendor/golang.org/x/sync/errgroup/errgroup.go vendor/modules.txt

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[mtrmac]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mtrmac, renovate[bot]

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