Automated cherry pick of #675: Stricter dependency/security review & update go version #720: update the go version to 1.21.3

[hakman]

Cherry pick of #675 #720 on release-1.26.

#675: Stricter dependency/security review & update go version
#720: update the go version to 1.21.3

For details on the cherry pick process, see the cherry pick requests page.

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[cartermckinnon]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

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[cartermckinnon]

/release-note-none

[cartermckinnon]

/lgtm

didn't realize we always need both labels