Backport of VAULT-17586: Add concurency to ci and build workflows into release/1.14.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #21550 to be assessed for backporting due to the inclusion of the label backport/1.14.x.

🚨

Warning automatic cherry-pick of commits failed. If the first commit failed,
you will see a blank no-op commit below. If at least one commit succeeded, you
will see the cherry-picked commits up to, not including, the commit where
the merge conflict occurred.

The person who merged in the original PR is:
@miagilepner
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.

merge conflict error: POST https://api.github.com/repos/hashicorp/vault/merges: 409 Merge conflict []

The below text is copied from the body of the original PR.

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This PR adds a concurrency parameter to the build.yml and ci.yml workflows. There will only ever be one job running with the same group label. The group will either be the head branch, which is only present in PRs, or will be the uniquely assigned runID. That means that if it's a PR, there will only ever one of each of these workflows running for the same branch and an in-progress workflow will be cancelled in favor of a new one. For all other triggers, there will be no cancellation.

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Overview of commits

• eecae3a

[hashicorp-cla]

All committers have signed the CLA.

[kubawi]

LGTM