Fix the nodesource.list cannot read issue, it is cased by the full path not used.
```
2021-12-03T06:59:26.0019306Z Removing intermediate container 77cfe980cd36
2021-12-03T06:59:26.0020872Z ---> 528fd40e60f6
2021-12-03T06:59:26.0021457Z Step 81/81 : RUN post_run_buildinfo
2021-12-03T06:59:26.0841136Z ---> Running in d804bd7e1b06
2021-12-03T06:59:29.1626594Z [91mDEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
2021-12-03T06:59:34.2960105Z [0m[91m/usr/bin/sed: can't read nodesource.list: No such file or directory
2021-12-03T06:59:34.5094880Z [0mThe command '/bin/sh -c post_run_buildinfo' returned a non-zero code: 2
```
Co-authored-by: Ubuntu <xumia@xumia-vm1.jqzc3g5pdlluxln0vevsg3s20h.xx.internal.cloudapp.net>
Add 3 pipeline files:
- pipeline for build docker image sonic-slave-[buster|jessie|stretch] for amd64/armhf/arm64, and push to ACR(sonicdev-microsoft.com)
- pipeline for build docker image sonic-mgmt, and push to ACR
- pipeline for cleaning dpkg cache which are created more than 30 days.
Co-authored-by: lguohan <lguohan@gmail.com>
