feat: add post3 s3 proxy for postgresql

Signed-off-by: kjuulh <contact@kjuulh.io>

s3-compliance/s3tests.conf.template

@@ -0,0 +1,49 @@
+[DEFAULT]
+host = 127.0.0.1
+port = __PORT__
+is_secure = no
+
+[fixtures]
+bucket prefix = test-{random}-
+
+[s3 main]
+display_name = test
+user_id = testid
+email = test@example.com
+access_key = test
+secret_key = test
+api_name = default
+
+[s3 alt]
+display_name = testalt
+user_id = testaltid
+email = testalt@example.com
+access_key = testalt
+secret_key = testalt
+
+[s3 tenant]
+display_name = testtenant
+user_id = testtenantid
+email = testtenant@example.com
+access_key = testtenant
+secret_key = testtenant
+tenant = tenant
+
+[iam]
+email = s3@example.com
+user_id = testiam
+access_key = testiam
+secret_key = testiam
+display_name = testiam
+
+[iam root]
+access_key = iamrootkey
+secret_key = iamrootsecret
+user_id = iamrootid
+email = iamroot@example.com
+
+[iam alt root]
+access_key = iamaltkey
+secret_key = iamaltsecret
+user_id = iamaltid
+email = iamalt@example.com