[s3acl] Step1: move s3account.AccountManager into to iam.S3ApiConfiguration (#4859)

* move s3account.AccountManager into to iam.S3ApiConfiguration and switch to Interface

https://github.com/seaweedfs/seaweedfs/issues/4519

* fix: test bucket acl default and
adjust the variable names

* fix: s3 api config test

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Co-authored-by: Konstantin Lebedev <9497591+kmlebedev@users.noreply.github.co>
Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>

docker/compose/s3tests.conf

@@ -18,10 +18,10 @@ bucket prefix = yournamehere-{random}-
 
 [s3 main]
 # main display_name set in vstart.sh
-display_name = s3_tests
+display_name = M. Tester
 
 # main user_idname set in vstart.sh
-user_id = s3_tests
+user_id = testid
 
 # main email set in vstart.sh
 email = tester@ceph.com