ci: Pin Github Action versions to hashes

[jonathan-innis]

Fixes #N/A

Description

This PR pins all of our third-party actions to a full-length SHA to ensure they are not vulnerable to a supply-chain attack. This is the best practice for third-party GHA as described here: https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-third-party-actions

How was this change tested?

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[coveralls]

Pull Request Test Coverage Report for Build 6907206257

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.04%) to 80.129%

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Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/disruption/drift.go	2	79.1%
pkg/controllers/disruption/expiration.go	2	84.38%

Totals
Change from base Build 6907189146:	-0.04%
Covered Lines:	8343
Relevant Lines:	10412

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💛 - Coveralls

[jmdeal]

LGTM 🚀