Add option to serialize formatAndMount

[mattcary]

/kind bug

What this PR does / why we need it:

This a follow-on to #1168 and #1169. In addition to mkfs, we are now seeing reports from the field of fsck OOMing.

This change serializes formatAndMount in this driver. In parallel we will be extended mount-utils, and will remove this fix once the mount-utils release comes out (which releases every month or two).

Add option for serializing formatAndMount, including fsck as well as mkfs.

/asssign @saikat-royc

[saikat-royc]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mattcary, saikat-royc

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[mattcary]

/cherry-pick release-1.10

[k8s-infra-cherrypick-robot]

@mattcary: new pull request created: #1310

In response to this:

/cherry-pick release-1.10

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[mattcary]

/cherry-pick release-1.9

[k8s-infra-cherrypick-robot]

@mattcary: #1294 failed to apply on top of branch "release-1.9":

Applying: Add option to serialize formatAndMount
Using index info to reconstruct a base tree...
M	cmd/gce-pd-csi-driver/main.go
M	pkg/gce-pd-csi-driver/node.go
M	pkg/gce-pd-csi-driver/node_test.go
M	test/e2e/utils/utils.go
Falling back to patching base and 3-way merge...
Auto-merging test/e2e/utils/utils.go
CONFLICT (content): Merge conflict in test/e2e/utils/utils.go
Auto-merging pkg/gce-pd-csi-driver/node_test.go
Auto-merging pkg/gce-pd-csi-driver/node.go
Auto-merging cmd/gce-pd-csi-driver/main.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Add option to serialize formatAndMount
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.9

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.