* address lint reports
* add diff-oss-ci and test-ui jobs to ci GHA workflow
* Add actions linter workflow
* Fix actions linter errors
* pin 3rd party components with SHA hash and limit actionlint workflow to pull requests touching paths under .github directory
* Fix actionlint runner
* pin SHA hash of 3rd party components
use .go-version file to provide go version to setup-go action
remove unncessary ref parameter in checkout action
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Co-authored-by: Brian Shore <bshore@hashicorp.com>
