MMP: Propagate user requests upstream, apply requests to quantsim (#3466

)

* Added support for upstream request propagation and application to qsim
* minor updates based on PR feedback
* added initial support for strict mode
* updated default fields in MpRequest
* Changed Candidate->Precision, update __lt__ operator to resolve comments
* Update module include
* Added explicit failure when propagating to ops with multiple outputs
* disregard param quantizers during upward propagation
* Explicitly assert False if input/output product matching fails
---------
Signed-off-by: Ashvin Kumar <quic_ashvkuma@quicinc.com>

TrainingExtensions/torch/src/python/aimet_torch/v2/mixed_precision/__init__.py

@@ -0,0 +1,41 @@
+# -*- mode: python -*-
+# =============================================================================
+#  @@-COPYRIGHT-START-@@
+#
+#  Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are met:
+#
+#  1. Redistributions of source code must retain the above copyright notice,
+#     this list of conditions and the following disclaimer.
+#
+#  2. Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions and the following disclaimer in the documentation
+#     and/or other materials provided with the distribution.
+#
+#  3. Neither the name of the copyright holder nor the names of its contributors
+#     may be used to endorse or promote products derived from this software
+#     without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+#  POSSIBILITY OF SUCH DAMAGE.
+#
+#  SPDX-License-Identifier: BSD-3-Clause
+#
+#  @@-COPYRIGHT-END-@@
+# =============================================================================
+
+# pylint: disable=all
+
+from .manual_mixed_precision import MixedPrecisionConfigurator
+from .utils import Precision, SupportedDType