Disable Keycloak Dev Services and reenable tests on Windows

[hbelmiro]

After merging #864, disable Keycloak Dev Services if needed and reenable tests on Windows in:

quarkus-openapi-generator/.github/workflows/build.yml

Line 33 in fa01799

# windows-latest - Disabled due to https://github.com/quarkiverse/quarkus-openapi-generator/pull/836#issuecomment-2457329495

quarkus-openapi-generator/.github/workflows/build.yml

Line 62 in fa01799

# windows-latest - Disabled due to https://github.com/quarkiverse/quarkus-openapi-generator/pull/836#issuecomment-2457329495

[github-actions]

@ricardozanini @hbelmiro This is being labeled as Stale.