Migrate (pkg/ddc/juicefs/worker_test.go) tests to use Ginkgo (#5537)

* test(juicefs): migrate worker_test to ginkgo

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

* fix: fetch from client + suite package + import alias

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

* fix: change base suite and tests to package base

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

* fix: revert accidental changes to base package

Restores pkg/ddc/base/base_suite_test.go and runtime_conventions_test.go
to their upstream versions. These files should remain as package base_test
(external test package) to avoid conflicts with existing tests.

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

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

Author: hxrshxz