Fix config macro TAG for thinkst and fix the default value for the okta main log event stream config macros

[kris-watts-gravwell]

This PR addresses no specific issue

This PR proposes...

• Fixing the config macro for the thinkst kit to be a TAG
• update the default value for okta config macro to match what the hosted-ingester is producing

PR Tasks

• e2e and/or unit tests included. If not, please provide an explanation.
• Bug fixes only: minimal repro steps included on the issue (for PR QA + Release QA).

Reviewer Tasks

• e2e or unit tests are present to test the proposed changes.
• Code is sufficiently documented.
• Code meets quality and correctness expectations.

[keith-smiley-gravwell]

LGTM