Add integration test for deleting vectors

[rohanshah18]

Problem

The sdk currently lacks integration tests for deleting vectors.

Solution

Vectors can be deleted in multiple ways, so added an integration tests that covers all of the different possibilities.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Infrastructure change (CI configs, etc)
• Non-code change (docs, etc)
• None of the above: Integration tests

Test Plan

Ran integration tests

[austin-denoble]

Overall looks good to me, thanks for continuing to get the integration tests off the ground!

Most of my questions and comments are around readability of tests and aren't necessarily blocking. We could probably bike shed how we mock things for quite a while.