fix: Update goreleaser workflow to fix warnings and artifact generation

[bryantbiggs]

What this PR does / why we need it:

• Update goreleaser workflow to fix warnings and artifact generation
  • Flatten tag workflow into release workflow; now the tag and release process works in series when the version.txt is changed. This fixes the issue where the tag workflow creates the tag, but the release workflow is not triggered - https://github.com/orgs/community/discussions/27028#discussioncomment-3254360 which requires a users to run the workflow dispatch manually to start the release workflow
• Removed the draft and prerelease arguments - this was leaving the release in a draft mode when I tested the workflow https://github.com/clowdhaus/aws-iam-authenticator/releases/tag/untagged-5156821368231e9f9e67
  • It now creates the release correctly and marked as latest with artifacts https://github.com/clowdhaus/aws-iam-authenticator/releases/tag/v0.6.24
• The go.sum updates are due to running go mod tidy to pass CI checks - these were introduced in cc68d23

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #720
Fixes #722

[wongma7]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bryantbiggs, nnmin-aws

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