fix backup restore, canary test and install job retention

[rokej]

Description of the change(s):

• When a managed cluster is restored to a DR hub, detect the change in the hub kubeconfig and restart the agent to pick up the new hub's kubeconfig for API connection
• Fix the condition check for HO reinstallation
• Fix canary test
• Change the HO installation job TTL from 20 minutes to 48 hours to give SREs enough time for troubleshooting

Why do we need this PR:

• Backup and restore
• Tests
• Troubleshooting ability

Issue reference:

• https://issues.redhat.com/browse/ACM-4687

Test API/Unit - Success

n-operator/pkg/util -coverprofile cover.out
?   	github.com/stolostron/hypershift-addon-operator/cmd	[no test files]
ok  	github.com/stolostron/hypershift-addon-operator/pkg/agent	29.482s	coverage: 71.3% of statements
ok  	github.com/stolostron/hypershift-addon-operator/pkg/install	176.019s	coverage: 86.0% of statements
ok  	github.com/stolostron/hypershift-addon-operator/pkg/manager	121.397s	coverage: 60.2% of statements
ok  	github.com/stolostron/hypershift-addon-operator/pkg/metrics	0.967s	coverage: 100.0% of statements
?   	github.com/stolostron/hypershift-addon-operator/pkg/util	[no test files]

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rokej

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• OWNERS [rokej]

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[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

52.6% Coverage
0.0% Duplication

[openshift-ci]

@rokej: 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
ci/prow/sonar	ec3c89a	link	true	/test sonar

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