Remove prefer-dist from COMPOSER_FLAGS in CI workflow.

Eliminating the --prefer-dist option can reduce reliance on distribution archives, allowing for more consistent test execution. This change aims to enhance the flexibility and potential versions available during the dependency resolution in the CI pipeline.

Signed-off-by: mesilov <[email protected]>

.github/workflows/tests-functional.yml

@@ -5,7 +5,7 @@ on:
   pull_request:
 
 env:
-  COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
+  COMPOSER_FLAGS: "--ansi --no-interaction --no-progress"
   DATABASE_HOST: localhost
   DATABASE_USER: b24phpLibTest
   DATABASE_PASSWORD: b24phpLibTest