fix name on the path for extension installations

[atheo89]

Related to: https://issues.redhat.com/browse/RHOAIENG-3213

Description

Fix the name from codeserver -> code-server, as well as added better comments on the code.

It fixes the bellow message on the terminal:

After that change this message vanished:

How Has This Been Tested?

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[harshad16]

/lgtm
/approve

thanks 💯

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: harshad16, jstourac

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[harshad16]

/cherrypick 2023b

[openshift-cherrypick-robot]

@harshad16: new pull request created: #426

In response to this:

/cherrypick 2023b

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