**- Why I did it**
python2 is end of life and SONiC is going to support python3. This PR is going to support:
1. Build pmon daemons with python3
2. Install and run python3 version pmon daemons
**- How I did it**
1. Change pmon daemons make files to build bothe python2 and python3 whl
2. Change docker-platform-monitor make files to install both python2 and python3 whl
3. Change pmon docker startup files to start pmon daemons according to the supported platform API version
As part of migrating all Python-based package installers to wheel format rather than Debian packages. Also to allow for easily building a Python 3 version of the package in the near future. ledd and psud were converted in earlier PRs. This PR converts the remainder:
- pcied
- syseepromd
- thermalctld
- xcvrd
As part of migrating all Python-based package installers to wheel format rather than Debian packages. Also to allow for easily building a Python 3 version of the package in the near future.
- Also remove some references to sonic-daemon-base which I previously missed and add missing sonic-py-common dependency for sonic-pcied.
