Automatic merge from submit-queue (batch tested with PRs 36721, 46483, 45500, 46724, 46036)

AWS: Allow configuration of a single security group for ELBs

**What this PR does / why we need it**:
AWS has a hard limit on the number of Security Groups (500).  Right now every time an ELB is created Kubernetes is creating a new Security Group.  This allows for specifying a Security Group to use for all ELBS

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:
For some reason the Diff tool makes this look like it was way more changes than it really was. 
**Release note**:

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