onnxruntime

c8524d2d - Refactor web-ci pipeline and delete eager mode CI pipeline (#15416)

Refactor web-ci pipeline and delete eager mode CI pipeline (#15416) ### Description 1. Move it to a separated pool that use the same image as [the public hosted pool](https://learn.microsoft.com/en-us/azure/devops/pipelines/agents/hosted?view=azure-devops&tabs=yaml). Also, create a beta pool which contains the next version image of the hosted pool, and add jobs in our post merge pipeline to test if the next version image will break our CI. So, usually we will have at least one week to prepare. 2. Change the cmake generator in use in our pipelines from "Ninja" to "MingW Makefile", because the latest version of cmake doesn't work with the latest version of Ninja. People who prefer Ninja could still use ninja in their local build by passing "--cmake_generator ninja" to [build.py](https://github.com/microsoft/onnxruntime/blob/main/tools/ci_build/build.py). 3. Delete eager mode CI pipeline. ### Motivation and Context I need to update the software we have in our CI build machines, and I need to resolve this incompatibility issue. In more detail, the build error I hit was: em++: error: CMakeFilesonnxruntime_mlas_test.dirC_a_work1sonnxruntimetestmlasunittesttest_activation.cpp.o: No such file or directory ("CMakeFilesonnxruntime_mlas_test.dirC_a_work1sonnxruntimetestmlasunittesttest_activation.cpp.o" was expected to be an input file, based on the commandline arguments provided) After this PR we will deprecate python 3.7 support. The eager mode CI pipeline is the last one that still use python 3.7. Then we can rework the PR #10953 made by [fs-eire](https://github.com/fs-eire) last year. Fixed [AB#14435](https://aiinfra.visualstudio.com/6a833879-cd9b-44a4-a9de-adc2d818f13c/_workitems/edit/14435)