Opt 8 cleanup: Remove C8 license properties from UIConfiguration API

[PHWaechtler]

With https://github.com/camunda/camunda-optimize/issues/12594, we fork optimize into two versions. Since we moved Optimize 8 into the mono repo, the Optimize repo needs to be cleaned up from any code related to Optimize 8.

Acceptance Criteria (Required on creation)

• C8 license properties are removed from UIConfiguration

Hints

It is not clear to me which ones the C8 license properties are, may reach out to @matthewBearCamunda to clarify.

Links

Sub task of https://github.com/camunda/camunda-optimize/issues/13807

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[matthewBearCamunda]

@PHWaechtler - The license cosw for the Optimize repo was added with this PR: camunda/camunda#21199 I'd imagine most of it would need to be removed for C7.

As for the properties on the ui-config endpoint, there are two. validLicense and licenseType

[PHWaechtler]

@matthewBearCamunda We just checked and it looks like there are no fields with those names in the UiConfigurationResponseDto currently, but we also dont see that these fields were added/removed in recent commits to the file. The PR you linked is for the monorepo, was there an equivalent for the Optimize repo as well? Or were these fields never added for hybrid Optimize versions?