Original replacement script:
```
-BEGIN VERIFY SCRIPT-
sed -i --regexp-extended -e 's/test_bitcoin\.(h|cpp)/setup_common.\1/g'
$(git grep -l test_bitcoin)
git mv ./src/test/test_bitcoin.h ./src/test/setup_common.h
git mv ./src/test/test_bitcoin.cpp ./src/test/setup_common.cpp
sed -i -e 's/BITCOIN_TEST_TEST_BITCOIN_H/BITCOIN_TEST_SETUP_COMMON_H/g'
./src/test/setup_common.h
-END VERIFY SCRIPT-
```
Partial backport of core PR15788:
https://github.com/bitcoin/bitcoin/pull/15788/commits/fa821904bf8870d8957a82ea65c0c7a8e84272a6#diff-cbf056cfc6c760726f2dff1391fd37d8
Depends on D5493.
This touches a lot of files, but is renaming only and unfortunately
cannot be split without breaking the build.