Fix: Workflow maintaining conda environment

[fmalatino]

Description
This PR ensures that the same shell is opened across workflow steps and no longer calls for removal of sqlite after installation.

Fixes:
Current failures in the workflow

How Has This Been Tested?
Tested using current set of unit tests

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included

[jjuyeonkim]

I tried out similar changes in my own PRs and can confirm that these fixes work on my tests as well.

(Side note: I wish we knew more in the first place about why the sqlite removal and oversubscribe were necessary before but are causing CI errors now. I remember needing to add the oversubscribe for previous PRs. )

[oelbert]

👍