Adds BaseAlphaModelFrameworkRegressionAlgorithm (#7107)

* Adds BaseAlphaModelFrameworkRegressionAlgorithm

`BaseAlphaModelFrameworkRegressionAlgorithm` will be used to validate Alpha Model regression algorithm with the same universe.

- HistoricalReturnsAlphaModelFrameworkAlgorithm
- EmaCrossAlphaModelFrameworkAlgorithm
- MacdAlphaModelFrameworkAlgorithm
- RsiAlphaModelFrameworkAlgorithm
- BasePairsTradingAlphaModelFrameworkAlgorithm

* Addresses Peer-Review

Algorithm.Python/EmaCrossAlphaModelFrameworkAlgorithm.py

@@ -0,0 +1,25 @@
+# QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+# Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from AlgorithmImports import *
+from BaseAlphaModelFrameworkRegressionAlgorithm import BaseAlphaModelFrameworkRegressionAlgorithm
+from Alphas.EmaCrossAlphaModel import EmaCrossAlphaModel
+
+### <summary>
+### Framework algorithm that uses the <see cref="EmaCrossAlphaModel"/>.
+### </summary>
+class EmaCrossAlphaModelFrameworkAlgorithm(BaseAlphaModelFrameworkRegressionAlgorithm):
+
+    def Initialize(self):
+        super().Initialize()
+        self.SetAlpha(EmaCrossAlphaModel())