include additional devtoolset packages

[smanders]

the centos7-pro image currently includes three packages from the devtoolset software collection
https://github.com/smanders/buildpro/blob/21.04/image/centos7-pro.dockerfile#L24-L26

     devtoolset-7-binutils `#scl` \
     devtoolset-7-gcc `#scl` \
     devtoolset-7-gcc-c++ `#scl` \

but not libasan-devel http://mirror.centos.org/centos/7/sclo/x86_64/rh/Packages/d/

[smanders]

planning to add

• devtoolset-7-libasan-devel
• devtoolset-7-libtsan-devel
• devtoolset-7-gdb

I don't know if the following are needed, so won't add them, for now

• devtoolset-7-gdb-doc
• devtoolset-7-gdb-gdbserver
• devtoolset-7-gcc-gdb-plugin

[smanders]

all of the palam unit tests fail with asan detected and used -- all similar to the following

==8020==LeakSanitizer has encountered a fatal error.
==8020==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
==8020==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)

it appears this is a well-known issue related to running docker

• https://developercommunity.visualstudio.com/t/address-sanitizer-doesnt-work-on-build-bots/203261
• LeakSanitizer has encountered a fatal error google/sanitizers#764 (comment)
• Leak detection doesn't work google/oss-fuzz#9 (comment)

docker compose cap_add https://docs.docker.com/compose/compose-file/compose-file-v2/#cap_add-cap_drop

[smanders]

completed with commits to dev branch referenced above