Update test cases of web terminal configuration page

Description

This is the follow up story for PR - https://github.com/openshift/console/pull/12718. Couple of tests, which are dependent on YAML are added as manual tests. Need to add proper tests for that.

Acceptance Criteria

1. Add automated tests instead of manual for PR - https://github.com/openshift/console/pull/12718.
   After submit, switch to developer tab and comeback to web terminal tab and see the populated values. This should reflect the newly updated values.
2. Remove the delays added(cy.wait) in customization-of-web-terminal.ts[ |https://github.com/openshift/console/pull/12718/files#diff-bea278ba2b0622e97023a25a89e91b2194e3ba73824d81ea4b08046558ba8718]and make sure all the tests are passing 
3. Write test cases for utils updatedWebTerminalExec and updatedWebTerminalTooling

Additional Details:

Refer PR - https://github.com/openshift/console/pull/12718 for more details