Cherrypick #644, #647, #652 from master to release-1.1

[saad-ali]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
Cherrypick #647 from master to release-1.1: Update kustomizer to 3.8.6
Cherrypick #644 from master to release-1.1: Add release notes for 1.1.0 release
Cherrypick #652 from master to release-1.1: Update staging RC to use new 1.1.0 RC build

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

None

/assign @jingxu97
/assign @msau42

[k8s-ci-robot]

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[msau42]

/lgtm

[saad-ali]

Test failed:

W1031 00:30:45.400] F1031 00:30:45.399921    3277 main.go:161] Failed to run integration test: failed to install CSI Driver: failed to install kustomize: installing kustomize
W1031 00:30:45.401] curl: no URL specified!
W1031 00:30:45.401] curl: try 'curl --help' or 'curl --manual' for more information
W1031 00:30:45.402] , err: exit status 123
W1031 00:30:45.416] Traceback (most recent call last):
W1031 00:30:45.417]   File "/workspace/./test-infra/jenkins/../scenarios/execute.py", line 50, in <module>
W1031 00:30:45.417]     main(ARGS.env, ARGS.cmd + ARGS.args)
W1031 00:30:45.418]   File "/workspace/./test-infra/jenkins/../scenarios/execute.py", line 41, in main
W1031 00:30:45.418]     check(*cmd)
W1031 00:30:45.418]   File "/workspace/./test-infra/jenkins/../scenarios/execute.py", line 30, in check
W1031 00:30:45.419]     subprocess.check_call(cmd)
W1031 00:30:45.419]   File "/usr/lib/python2.7/subprocess.py", line 190, in check_call
W1031 00:30:45.419]     raise CalledProcessError(retcode, cmd)
W1031 00:30:45.419] subprocess.CalledProcessError: Command '('test/run-k8s-integration.sh',)' returned non-zero exit status 255
E1031 00:30:45.452] Command failed
I1031 00:30:45.453] process 630 exited with code 1 after 34.9m
E1031 00:30:45.454] FAIL: pull-gcp-compute-persistent-disk-csi-driver-kubernetes-integration

Per #649 the fix is in #647 -- that PR should be cherry picked to the release branch first.

[jingxu97]

this is caused by kustimization release download does not include 3.8.0 which we specified in the script. I already fix it in #647

[saad-ali]

/hold

[saad-ali]

Added #647 to the cherry pick.
PTAL

[saad-ali]

/hold cancel

[msau42]

/lgtm