Switch to gocron v2 and fix flaky ci

[adriananeci]

Bump gocron to v2 and attempt to fix the flaky TestNodeIsCleanedUp e2e test.

Related Issue

Motivation and Context

How Has This Been Tested?

Tested it locally, some logs snippets

time="2024-05-17T09:41:25Z" level=info msg="K8s-shredder info" BuildTime= GitSHA=45dfbde Version=dev-45dfbde
time="2024-05-17T09:41:25Z" level=info msg="Initializing metrics server"
time="2024-05-17T09:41:25Z" level=info msg="Loaded configuration" AllowEvictionLabel=shredder.ethos.adobe.net/allow-eviction EvictionLoopInterval=10s ExpiresOnLabel=shredder.ethos.adobe.net/parked-node-expires-on NamespacePrefixSkipInitialEviction=ns-ethos- ParkedNodeTTL=30s RestartedAtAnnotation=shredder.ethos.adobe.net/restartedAt RollingRestartThreshold=0.5 ToBeDeletedTaint=ToBeDeletedByClusterAutoscaler UpgradeStatusLabel=shredder.ethos.adobe.net/upgrade-status
time="2024-05-17T09:41:25Z" level=info msg="Configured scheduler job with ID: 883615f4-1eb7-4089-a29a-ac1bebdbacba"
time="2024-05-17T09:41:25Z" level=info msg="Active jobs: [883615f4-1eb7-4089-a29a-ac1bebdbacba]"
time="2024-05-17T09:41:25Z" level=info msg="Scheduler started, happy shredding!"
time="2024-05-17T09:41:35Z" level=info msg="Starting eviction loop" dryRun=false
time="2024-05-17T09:41:45Z" level=info msg="Starting eviction loop" dryRun=false
time="2024-05-17T09:41:45Z" level=info msg="Processing node k8s-shredder-test-cluster-worker" dryRun=false
time="2024-05-17T09:41:45Z" level=info msg="Evicting pod test-app-caas-5559dcc49d-rtn62 from ns-k8s-shredder-test namespace" dryRun=false
time="2024-05-17T09:41:45Z" level=info msg="Evicting pod test-app-caas-5559dcc49d-sc8tf from ns-k8s-shredder-test namespace" dryRun=false
time="2024-05-17T09:41:45Z" level=info msg="Evicting pod test-app-allow-eviction-5c964d4b75-kvf2d from ns-team-k8s-shredder-test namespace" dryRun=false
time="2024-05-17T09:41:45Z" level=info msg="Evicting pod test-app-allow-eviction-5c964d4b75-q6m4r from ns-team-k8s-shredder-test namespace" dryRun=false

time="2024-05-17T09:44:54Z" level=info msg="Configuration file `/k8s-shredder-config/..2024_05_17_09_44_54.4115186607` changed, attempting to reload"
time="2024-05-17T09:44:54Z" level=info msg="Loaded configuration" AllowEvictionLabel=shredder.ethos.adobe.net/allow-eviction EvictionLoopInterval=10s ExpiresOnLabel=shredder.ethos.adobe.net/parked-node-expires-on NamespacePrefixSkipInitialEviction=ns-ethos- ParkedNodeTTL=31s RestartedAtAnnotation=shredder.ethos.adobe.net/restartedAt RollingRestartThreshold=0.5 ToBeDeletedTaint=ToBeDeletedByClusterAutoscaler UpgradeStatusLabel=shredder.ethos.adobe.net/upgrade-status
time="2024-05-17T09:44:54Z" level=info msg="Configured scheduler job with ID: 44223ce1-d7b4-407a-879b-9cebe493af9f"
time="2024-05-17T09:44:54Z" level=info msg="Active jobs: [44223ce1-d7b4-407a-879b-9cebe493af9f]"

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[JonnieDoe]

/lgtm

[aalexandru]

/lgtm