Automated backport of #2743: Use leader election in globalnet controller #4265

Job	Run time
Submariner K8s API Code Generation	4m 20s
No "Apply suggestions from code review" Commits	3s
Commit Message(s)	16s
Go	6m 15s
Dependency Licenses	3m 1s
Markdown Links (modified files)	14s
Markdown	12s
Package Documentation	57s
Protobuf Code Generation	51s
Shell	8s
Vulnerability Scanning	27s
YAML	9s
	16m 53s

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