Add GNU readline to mingw github action

[mcuee]

This is an improved version of PR#1513 which fixes the issue of bringing in undesired dependency libwinpthread-1.dll.

Reference:

• Add GNU readline to mingw github action #1513 (comment)

[mcuee]

If we can fix #1271 then it is better not to use GNU Readline with MinGW. Unfortunately PR #1553 does not work. So this is a compromised solution.

• To adopt PR #1264 approach of using Readline replacement for MinGW build (Low Priority) #1271
• To adopt PR #1264 approach of using Readline replacement for MinGW build (WIP, DNM) #1553

[mcuee]

Testing the mingw64 binary generated by github action:
https://github.com/avrdudes/avrdude/actions/runs/6926969540

 MINGW64 /c/work/avr/avrdude_test/avrdude_bin/github/pr1576
$ ldd ./avrdude.exe
        ntdll.dll => /c/WINDOWS/SYSTEM32/ntdll.dll (0x7ffc2f650000)
        KERNEL32.DLL => /c/WINDOWS/System32/KERNEL32.DLL (0x7ffc2ea80000)
        KERNELBASE.dll => /c/WINDOWS/System32/KERNELBASE.dll (0x7ffc2cd30000)
        ADVAPI32.dll => /c/WINDOWS/System32/ADVAPI32.dll (0x7ffc2f180000)
        msvcrt.dll => /c/WINDOWS/System32/msvcrt.dll (0x7ffc2eb60000)
        sechost.dll => /c/WINDOWS/System32/sechost.dll (0x7ffc2e500000)
        RPCRT4.dll => /c/WINDOWS/System32/RPCRT4.dll (0x7ffc2f290000)
        SETUPAPI.dll => /c/WINDOWS/System32/SETUPAPI.dll (0x7ffc2e610000)
        HID.DLL => /c/WINDOWS/SYSTEM32/HID.DLL (0x7ffc28080000)
        cfgmgr32.dll => /c/WINDOWS/System32/cfgmgr32.dll (0x7ffc2d0d0000)
        ucrtbase.dll => /c/WINDOWS/System32/ucrtbase.dll (0x7ffc2d5b0000)
        bcrypt.dll => /c/WINDOWS/System32/bcrypt.dll (0x7ffc2d580000)
        USER32.dll => /c/WINDOWS/System32/USER32.dll (0x7ffc2ec00000)
        win32u.dll => /c/WINDOWS/System32/win32u.dll (0x7ffc2d030000)
        GDI32.dll => /c/WINDOWS/System32/GDI32.dll (0x7ffc2f080000)
        gdi32full.dll => /c/WINDOWS/System32/gdi32full.dll (0x7ffc2d330000)
        msvcp_win.dll => /c/WINDOWS/System32/msvcp_win.dll (0x7ffc2d4e0000)
        WS2_32.dll => /c/WINDOWS/System32/WS2_32.dll (0x7ffc2f0b0000)