Update golangci-lint to fix aws-sdk-go-v2 linting issues

[mjlshen]

• We have been pinning to older versions of many golangci-lint packages that are no longer needed
• Updated golangci-lint to v1.61.0 and change a deprecated --deadline flag to --timeout
• Resolve linter errors - mostly this is ignoring staticcheck for KMSv1 code that's being carried

Resolves CI linting failures in #120 but depends on #121 to merge first to fix a separate CI issue

[k8s-ci-robot]

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This pull-request has been approved by: mjlshen
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[k8s-ci-robot]

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

Test name	Commit	Details	Required	Rerun command
pull-aws-encryption-provider-unittest	a27e32c	link	true	/test pull-aws-encryption-provider-unittest

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