add options to enable aws sdk debug log and add more logs when driver…

[AndyXiangLi]

… start up

Is this a bug fix or adding new feature?
Fixes #216
What is this PR about? / Why do we need it?
Add a new driver level option -aws-sdk-debug-log, if set to true, aws go sdk will add debug log to the std output.
Sample for debug log

2021/04/15 00:41:50 DEBUG: Send Request ec2/DescribeVolumes failed, attempt 0/8, error RequestError: send request failed
caused by: Post "https://ec2.us-west-2.amazonaws.com/": dial tcp 54.240.253.45:443: i/o timeout
2021/04/15 00:41:50 DEBUG: Request ec2/DescribeVolumes Details:

Also adjust and update the klog level across driver.
What testing is done?
unit test
e2e test

[k8s-ci-robot]

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[coveralls]

Pull Request Test Coverage Report for Build 1840

• 27 of 36 (75.0%) changed or added relevant lines in 6 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.2%) to 82.042%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/driver/driver.go	5	6	83.33%
pkg/driver/node.go	8	9	88.89%
pkg/driver/node_linux.go	0	1	0.0%
pkg/cloud/cloud.go	8	14	57.14%

Files with Coverage Reduction	New Missed Lines	%
pkg/cloud/cloud.go	1	82.15%

Totals
Change from base Build 1823:	0.2%
Covered Lines:	1832
Relevant Lines:	2233

---

💛 - Coveralls

[AndyXiangLi]

/test pull-aws-ebs-csi-driver-unit

[wongma7]

how come it's mocking ec2 interface now? the ec2 mock should go to mock_ec2.go (looking at script https://github.com/kubernetes-sigs/aws-ebs-csi-driver/blob/master/hack/update-gomock#L21)

[AndyXiangLi]

Interesting.. Can you try on your end? I just ran make bin/mockgen under project root path and get this EC2 mock added into the mock_cloud.go

[wongma7]

I tried with latest mockgen, it only changed my go.sum : /

~/g/s/g/k/aws-ebs-csi-driver (master|✔) $ rm bin/mockgen 
~/g/s/g/k/aws-ebs-csi-driver (master|✔) $ make mockgen
go get github.com/golang/mock/mockgen@latest
go: found github.com/golang/mock/mockgen in github.com/golang/mock v1.5.0
go: downloading golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e
go: downloading golang.org/x/mod v0.3.0
./hack/update-gomock

[AndyXiangLi]

figured that out.. I didn't specify the interface name when I ran the command.. updated now

[AndyXiangLi]

/test pull-aws-ebs-csi-driver-migration-test-latest

[AndyXiangLi]

@ayberk migration test is consistently failing the first time, any thoughts?

[wongma7]

/lgtm