fix(upgrade): Reverting back to old way of checking the volume status

[pawanpraka1]

Signed-off-by: Pawan pawan@mayadata.io

Why is this PR required? What issue does it fix?:

few customers are using old version of the driver where
Status field is not present. So mount will fail after the
upgrade to the 0.9.1 or later version.

Reverting back to the checking if finalizer is set to check if
volume is ready to be mounted.

We need to support upgrade for alpha release until we offically announce it that we no longer support upgrade for alpha release.

Added this in #184

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:

[codecov-commenter]

Codecov Report

Merging #196 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #196   +/-   ##
======================================
  Coverage    9.88%   9.88%           
======================================
  Files          20      20           
  Lines        1163    1163           
======================================
  Hits          115     115           
  Misses       1047    1047           
  Partials        1       1           

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