Update Alpine versions

[richlander]

This is a more pragmatic approach as proposed earlier. Use the old Alpine version for build and the new one for testing.

We can move to cross-build images when .NET 6 goes EOL.

[mikem8361]

The SOS tests are failing debug alpine because dumpheap -stat (an all managed command now) is hitting SIGSEGV. Of course there isn't enough info to diagnose the fault. This is going take some time to debug. I will need to create a docker container with the new alpine image, download the core dump causes the problem and debug SOS. It make take me a while to get to this (maybe by the end of the week). I don't think this actually a problem in the new image but it is uncovering some weird but in SOS.

   STDIN: 00:01.228: runcommand dumpheap -stat
        00:01.228: (lldb) runcommand dumpheap -stat
        STDERROR: 00:01.336: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
        STDERROR: 00:01.336: Stack dump:
        STDERROR: 00:01.336: 0.Program arguments: /usr/bin/lldb --no-lldbinit -o "settings set target.disable-aslr false" -o "settings set interpreter.prompt-on-quit false" -o "command script import /__w/1/s/src/SOS/SOS.UnitTests/Scripts/lldbhelper.py" -o version
        STDERROR: 00:01.336: 1.HandleCommand(command = "runcommand dumpheap -stat")
        STDERROR: 00:01.336: 2.HandleCommand(command = "dumpheap -stat")
        STDERROR: 00:01.336: LLDB diagnostics will be written to /tmp/diagnostics-20703a
        STDERROR: 00:01.336: Please include the directory content when filing a bug report
    }
    Process 19968 exited 139 (00:06.847 elapsed)
    
    SOSRunner error at /__w/1/s/src/SOS/SOS.UnitTests/Scripts/WebApp.script:115
    Excerpt from /__w/1/s/src/SOS/SOS.UnitTests/Scripts/WebApp.script:

[richlander]

Sounds good. Yes, this is more surgical approach, so we're getting more targeted information.