1b96a3cd1ebe725896f59614903184289fe62cf8 tests: reset fIsBareMultisigStd after bare-multisig tests (fanquake)
Pull request description:
Fixes: #18015
The bug this fixes is two-part.
1. The `fIsBareMultisigStd` global is being reused by other tests,
such as [script_p2sh_tests(set)](https://github.com/bitcoin/bitcoin/blob/master/src/test/script_p2sh_tests.cpp#L150), after being set to false.
2. The order our tests run in doesn't always? seem to be random,
which meant that the `script_p2sh` tests would only fail if they
were run in an order where the `transaction_tests` ran first,
mutating the `fIsBareMultisigStd` global.
This doesn't seem to happen when running make check, but if you
run `src/test/test_bitcoin and pass --random=99999`, the failure
in `script_p2sh` will occur (on most, but maybe not all systems):
```bash
src/test/test_bitcoin --random=99999
Running 389 test cases...
test/script_p2sh_tests.cpp:200: error: in "script_p2sh_tests/set": txTo[1].IsStandard
test/script_p2sh_tests.cpp:200: error: in "script_p2sh_tests/set": txTo[2].IsStandard
test/script_p2sh_tests.cpp:200: error: in "script_p2sh_tests/set": txTo[3].IsStandard
*** 3 failures are detected in the test module "Bitcoin Core Test Suite"
```
The new test for bare multisig was introduced in #17502.
ACKs for top commit:
Empact:
Code Review ACK 1b96a3cd1e
theStack:
ACK https://github.com/bitcoin/bitcoin/pull/18018/commits/1b96a3cd1ebe725896f59614903184289fe62c
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0130abbdb7