[Enhancement] Removal of Obsolete Test Cases for Unsupported v1 Snapshot Directory Structure

[seshachalam-yv]

Enhancement (What you would like to be added):

Removal of test cases related to the unsupported v1 snapshot directory structure in etcdbr here .

Note: This enhancement is based on the review comment in this #640 (comment).

Motivation (Why is this needed?):

The test cases in question were created when etcdbr transitioned from the v1 to the v2 snapshot directory structure. Their purpose was to ensure that garbage collection worked correctly for the old v1 structure. However, as we no longer support the v1 structure, these tests are no longer relevant to our current codebase. Keeping these tests may lead to confusion and unnecessary maintenance overhead.

Approach/Hint to the implement solution (optional):