Adds a call to map2pdb for Delphi projects, if map2pdb is an executable
on the path. This way, we get .pdb files we can use for debugging and
for performance profiling. This also replaces tds2dbg.
If map2dbg is available, then the build and install actions will copy
the PDB to be alongside the corresponding executable, making most debug
actions relatively seamless for finding symbols.
Also fixes up setup.exe in Windows and Developer to extend setup.exe to
a 512-byte boundary after map2pdb patches the PE.
Relates-to: #14787
Build-bot: skip release:developer,windows
Test-bot: skip
