max_tree_depth: lower it for MSVC to avoid stack overflows #1545

Job	Run time
config	8s
win+VS build	0s
linux32 (daald/ubuntu32:xenial)	1m 59s
linux-musl (alpine)	1m 58s
pedantic (fedora)	1m 59s
documentation	2m 0s
linux-asan-ubsan (ubuntu-latest)	1m 59s
linux-gcc (ubuntu-20.04)	1m 59s
linux-gcc-default (ubuntu-latest)	2m 3s
linux-leaks (ubuntu-latest)	1m 58s
linux-sha256 (ubuntu-latest)	1m 58s
linux-TEST-vars (ubuntu-20.04)	2m 3s
osx-clang (macos-12)	1m 47s
osx-gcc (macos-12)	1m 46s
sparse	2m 0s
static-analysis	2m 2s
win build	1m 58s
win+VS test	0s
win test	0s
	29m 37s

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