Don't remove trailing / on galaxy api URLS (#63294)

This causes multiple unneeded http redirects.
Since each http redirect takes a few hundred
milliseconds, handling the redirects starts to
take up a significant amount of wall time.

Fixes: #63281

lib/ansible/galaxy/api.py

@@ -523,7 +523,7 @@ class GalaxyAPI:
         :return: CollectionVersionMetadata about the collection at the version requested.
         """
         api_path = self.available_api_versions.get('v3', self.available_api_versions.get('v2'))
-        url_paths = [self.api_server, api_path, 'collections', namespace, name, 'versions', version]
+        url_paths = [self.api_server, api_path, 'collections', namespace, name, 'versions', version, '/']
 
         n_collection_url = _urljoin(*url_paths)
         error_context_msg = 'Error when getting collection version metadata for %s.%s:%s from %s (%s)' \
@@ -552,7 +552,7 @@ class GalaxyAPI:
             results_key = 'results'
             pagination_path = ['next']
 
-        n_url = _urljoin(self.api_server, api_path, 'collections', namespace, name, 'versions')
+        n_url = _urljoin(self.api_server, api_path, 'collections', namespace, name, 'versions', '/')
 
         error_context_msg = 'Error when getting available collection versions for %s.%s from %s (%s)' \
                             % (namespace, name, self.name, self.api_server)

test/units/galaxy/test_api.py

@@ -670,7 +670,7 @@ def test_get_collection_version_metadata_no_version(api_version, token_type, ver
     assert actual.dependencies == {}
 
     assert mock_open.call_count == 1
-    assert mock_open.mock_calls[0][1][0] == '%s%s/collections/namespace/collection/versions/%s' \
+    assert mock_open.mock_calls[0][1][0] == '%s%s/collections/namespace/collection/versions/%s/' \
         % (api.api_server, api_version, version)
 
     # v2 calls dont need auth, so no authz header or token_type
@@ -730,7 +730,7 @@ def test_get_collection_versions(api_version, token_type, token_ins, response, m
 
     assert mock_open.call_count == 1
     assert mock_open.mock_calls[0][1][0] == 'https://galaxy.server.com/api/%s/collections/namespace/collection/' \
-                                            'versions' % api_version
+                                            'versions/' % api_version
     if token_ins:
         assert mock_open.mock_calls[0][2]['headers']['Authorization'] == '%s my token' % token_type
 
@@ -854,7 +854,7 @@ def test_get_collection_versions_pagination(api_version, token_type, token_ins,
 
     assert mock_open.call_count == 3
     assert mock_open.mock_calls[0][1][0] == 'https://galaxy.server.com/api/%s/collections/namespace/collection/' \
-                                            'versions' % api_version
+                                            'versions/' % api_version
     assert mock_open.mock_calls[1][1][0] == 'https://galaxy.server.com/api/%s/collections/namespace/collection/' \
                                             'versions/?page=2' % api_version
     assert mock_open.mock_calls[2][1][0] == 'https://galaxy.server.com/api/%s/collections/namespace/collection/' \