Bump MySQL to 5.7.44 on Windows too

[peace-maker]

Dynamically link the CRT for the MySQL extension to be able to use libmysqlclient builds past the 5.5.54 release. This requires the VC runtime to be installed now while we previously linked them statically.

This allows to use the new caching_sha2_password default password encryption scheme from MySQL 8+ from Windows SRCDS too.

The build slaves need updating too if we want this.

Fixes #2231

Old dll dependencies

dumpbin /dependents dbi.mysql.ext.dll
Microsoft (R) COFF/PE Dumper Version 14.37.32824.0
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file dbi.mysql.ext.dll

File Type: DLL

  Image has the following dependencies:

    WSOCK32.dll
    Secur32.dll
    WS2_32.dll
    KERNEL32.dll
    ADVAPI32.dll

  Summary

      2BB000 .data
       1D000 .rdata
        7000 .reloc
        1000 .rsrc
       74000 .text

New dll dependencies

dumpbin /dependents dbi.mysql.ext.dll
Microsoft (R) COFF/PE Dumper Version 14.37.32824.0
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file dbi.mysql.ext.dll

File Type: DLL

  Image has the following dependencies:

    CRYPT32.dll
    WSOCK32.dll
    MSVCP140.dll
    Secur32.dll
    WS2_32.dll
    bcrypt.dll
    VCRUNTIME140.dll
    api-ms-win-crt-stdio-l1-1-0.dll
    api-ms-win-crt-convert-l1-1-0.dll
    api-ms-win-crt-heap-l1-1-0.dll
    api-ms-win-crt-runtime-l1-1-0.dll
    api-ms-win-crt-string-l1-1-0.dll
    api-ms-win-crt-environment-l1-1-0.dll
    api-ms-win-crt-math-l1-1-0.dll
    api-ms-win-crt-time-l1-1-0.dll
    api-ms-win-crt-utility-l1-1-0.dll
    api-ms-win-crt-filesystem-l1-1-0.dll
    KERNEL32.dll
    USER32.dll
    ADVAPI32.dll

  Summary

       B1000 .data
      33C000 .rdata
       1A000 .reloc
        1000 .rsrc
      1FD000 .text

[peace-maker]

We can't go to 8.0 because there are no 32bit libraries for Windows available.
https://dev.mysql.com/downloads/mysql/

There are some for linux though I haven't tried using them. MySQL 8.1+ dropped 32bit support.

EOL of 32-bit Software for MySQL 8.1+.

Starting with MySQL 8.1 and future releases, only 64-bit binaries will be provided. Existing MySQL 8.0 will continue to provide 32-bit and 64-bit binaries for supported platforms until EOL in April 2026.

[peace-maker]

It seems like we'd need to host the 8.0 32bit build ourselves if we'd want to update. The Windows installer only contains the x64 build too even though it is advertised to be 32 bit.

[psychonic]

It seems like we'd need to host the 8.0 32bit build ourselves if we'd want to update. The Windows installer only contains the x64 build too even though it is advertised to be 32 bit.

I don't think that's necessarily a problem.