fix(dependency) upgrade grpc lib dependency to v1.34.2

[iyashu]

Why is this PR required? What issue does it fix?:
Upgrading the grpc dependency to v1.34.2 since external provisioner itself using higher version.
It's being pointed out by @akhilerm under devide-localpv pull request comment openebs-archive/device-localpv#5 (comment)

What this PR does?:
Upgrade grpc dependency to v1.34.2. Additionally as mentioned in above comment due to breaking changes from upstream, I've fix the compilation prob under lvm/volume.go by replacing status.FromContextError(ctx.Err()) to status.FromContextError(ctx.Err()).Err().

Does this PR require any upgrade changes?:
No

If the changes in this PR are manually verified, list down the scenarios covered::
NA

Any additional information for your reviewer? :
NA

Checklist:

• Fixes #
• PR Title follows the convention of <type>(<scope>): <subject>
• Has the change log section been updated?
• Commit has unit tests
• Commit has integration tests
• (Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
• (Optional) If documentation changes are required, which issue on https://github.com/openebs/openebs-docs is used to track them:

[akhilerm]

LGTM