msvc: Compile test\fuzz\miniscript.cpp

[hebasto]

This PR resolves the remained point from the #29774 (comment):

What is the issue with the ... miniscript fuzz tests?

From the CI log:

miniscript_script: succeeded against 721 files in 1s.
Run miniscript_script with args ['D:\\a\\bitcoin\\bitcoin\\src\\fuzz.exe', WindowsPath('D:/a/_temp/qa-assets/fuzz_seed_corpus/miniscript_script')]
miniscript_smart: succeeded against 1429 files in 2s.
Run miniscript_smart with args ['D:\\a\\bitcoin\\bitcoin\\src\\fuzz.exe', WindowsPath('D:/a/_temp/qa-assets/fuzz_seed_corpus/miniscript_smart')]
miniscript_stable: succeeded against 1871 files in 2s.
Run miniscript_stable with args ['D:\\a\\bitcoin\\bitcoin\\src\\fuzz.exe', WindowsPath('D:/a/_temp/qa-assets/fuzz_seed_corpus/miniscript_stable')]
miniscript_string: succeeded against 918 files in 3s.
Run miniscript_string with args ['D:\\a\\bitcoin\\bitcoin\\src\\fuzz.exe', WindowsPath('D:/a/_temp/qa-assets/fuzz_seed_corpus/miniscript_string')]

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Type	Reviewers
ACK	maflcko, TheCharlatan

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[fanquake]

Based on #28657.

Can be rebased now.

[hebasto]

Based on #28657.

Can be rebased now.

Rebased and undrafted.

[maflcko]

ACK 9155b73

[TheCharlatan]

ACK 9155b73

[emc99]

There is no file at test/fuzz/miniscript

[hebasto]

There is no file at test/fuzz/miniscript

$ file src/test/fuzz/miniscript.cpp
src/test/fuzz/miniscript.cpp: C++ source, ASCII text

[hebasto]

Ported to the CMake-based build system in hebasto#187.

[emc99]

@hebasto Are you looking for someone to compile this file on msvc?