Remove unnecessary variables from Makefiles

[kariya-mitsuru]

Comprehensive Summary of your change

1. Makefile

   • Remove -e option since it is unnecessary when passing variables as command line arguments to make -f make/photon/Makefile. (The -e option is used to override variables defined in the Makefile with environment variables.)

   • Remove DEVFLAG and REGISTRYVERSION from make -f make/photon/Makefile command line arguments since they are unused in make/photon/Makefile.

   • Add TRIVYFLAG to make -f make/photon/Makefile command line argument since it is used in make/photon/Makefile. Strictly speaking, this argument is unnecessary, but it is better to have it to explicitly indicate that make/photon/Makefile also uses this variable.

   • Remove the variable definitions since the following variables are unused.

     • CONFIGPATH
     • CORE_PATH
     • DEVFLAG
     • DOCKERFILEPATH_COMMON
     • GOBUILD
     • GOBUILDMAKEPATH_EXPORTER
     • GOBUILDPATH_EXPORTER
     • GOCLEAN
     • GOCMD
     • GODEP
     • GOFMT
     • GOINSTALL
     • GOTEST
     • PORTAL_PATH
     • PREPAREPATH
     • SRCPATH
     • ZIPCMD

2. make/photon/Makefile

   • Remove the variable definitions since the following variables are unused.

     • CORE_BINARYNAME
     • CORE_SOURCECODE
     • DOCKERFILENAME_POSTGRESQL
     • DOCKERFILEPATH_POSTGRESQL
     • DOCKERIMAGENAME_POSTGRESQL
     • DOCKERIMAGES
     • JOBSERVICEBINARYNAME
     • JOBSERVICESOURCECODE
     • POSTGRESQL
     • SEDCMD
     • SRCPATH
     • TOOLSPATH
     • WGET

   • Remove the variable definitions since the following variables are specified as command line arguments when executed from Makefile.

     • BASEIMAGENAMESPACE
     • IMAGENAMESPACE

Issue being fixed

Please indicate you've done the following:

• [x] Well Written Title and Summary of the PR
• [ ] Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• [x] Accepted the DCO. Commits without the DCO will delay acceptance.
• [x] Made sure tests are passing and test coverage is added if needed.
• [ ] Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.