fix: Use blkid instead of lsblk in tests to get partition table

[vojtechtrefny]

Older versions of lsblk cannot print the PTTYPE column.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 10.73%. Comparing base (59fd1c6) to head (024212b). Report is 1 commits behind head on main.

:exclamation: There is a different number of reports uploaded between BASE (59fd1c6) and HEAD (024212b). Click for more details.

HEAD has 1 upload less than BASE

| Flag | BASE (59fd1c6) | HEAD (024212b) | |------|------|------| |sanity|1|0|

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #480 +/- ## ========================================== - Coverage 16.54% 10.73% -5.81% ========================================== Files 2 8 +6 Lines 284 1946 +1662 Branches 79 0 -79 ========================================== + Hits 47 209 +162 - Misses 237 1737 +1500 ``` | [Flag](https://app.codecov.io/gh/linux-system-roles/storage/pull/480/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=linux-system-roles) | Coverage Δ | | |---|---|---| | [sanity](https://app.codecov.io/gh/linux-system-roles/storage/pull/480/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=linux-system-roles) | `?` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=linux-system-roles#carryforward-flags-in-the-pull-request-comment) to find out more.

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[spetrosi]

[citest]

[vojtechtrefny]

[citest]

[richm]

Works locally with: ansible 2.9/centos-7, ansible 2.16/centos-8, ansible 2.17/centos-10

[richm]

The stratis failure on el8 is known and will be fixed in a subsequent PR