Migrate away from deprecated ioutil

[sebrandon1]

ioutil has been deprecated since Go 1.16: https://go.dev/doc/go1.16#ioutil

Tracking issue: redhat-best-practices-for-k8s/telco-bot#52

Migration from ioutil to os package:

File and directory operations:

• Replaced all instances of ioutil.ReadFile, ioutil.WriteFile, and ioutil.ReadDir with os.ReadFile, os.WriteFile, and os.ReadDir respectively throughout the codebase, including files like cfg.go, scmauths.go, sshkey.go, common.go, and their associated test files. [1] [2] [3] [4] [5] [6] [7] [8] [9]

• Updated all usages of ioutil.TempFile and ioutil.TempDir to os.CreateTemp and os.MkdirTemp respectively, ensuring temporary files and directories are created using the recommended APIs. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

Imports and cleanup:

• Removed all ioutil imports and replaced them with appropriate os imports in all affected files. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

These changes ensure the project is compatible with newer Go versions and avoids deprecated functionality.

[openshift-ci]

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[openshift-ci]

@sebrandon1: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-ovn	407f195	link	true	/test e2e-aws-ovn
ci/prow/unit	407f195	link	true	/test unit
ci/prow/security	407f195	link	false	/test security
ci/prow/images	407f195	link	true	/test images
ci/prow/e2e-aws-ovn-image-ecosystem	407f195	link	true	/test e2e-aws-ovn-image-ecosystem
ci/prow/e2e-aws-ovn-builds	407f195	link	true	/test e2e-aws-ovn-builds
ci/prow/okd-scos-images	407f195	link	true	/test okd-scos-images

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