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Merge bitcoin/bitcoin#30889: log: Use ConstevalFormatString
facbcd4 log: Use ConstevalFormatString (MarcoFalke) fae9b60 test: Use LogPrintStr to test m_log_sourcelocations (MarcoFalke) fa39b1c doc: move-only logging warning (MarcoFalke) Pull request description: This changes all logging (including the wallet logging) to produce a `ConstevalFormatString` at compile time, so that the format string can be validated at compile-time. I tested with `clang` and found that the compiler will use less than 1% more of time and memory. When an error is found, the compile-time error depends on the compiler, but it may look similar to: ``` src/util/string.h: In function ‘int main(int, char**)’: src/bitcoind.cpp:265:5: in ‘constexpr’ expansion of ‘util::ConstevalFormatString<1>(((const char*)"Hi %s %s"))’ src/util/string.h:38:98: in ‘constexpr’ expansion of ‘util::ConstevalFormatString<1>::Detail_CheckNumFormatSpecifiers(std::basic_string_view<char>(((const char*)((util::ConstevalFormatString<1>*)this)->util::ConstevalFormatString<1>::fmt)))’ src/util/string.h:78:34: error: expression ‘<throw-expression>’ is not a constant expression 78 | if (num_params != count) throw "Format specifier count must match the argument count!"; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` This refactor does not change behavior of the compiled executables. ACKs for top commit: hodlinator: re-ACK facbcd4 l0rinc: ACK facbcd4 ryanofsky: Code review ACK facbcd4 pablomartin4btc: re-ACK facbcd4 stickies-v: Approach ACK and code LGTM facbcd4 modulo a `tinyformat::format_error` concern. Tree-SHA512: 852f74d360897020f0d0f6e5064edc5e7f7dacc2bec1d5feff22c634a2fcd2eb535aa75be0b7191d9053728be6108484c737154b02d68ad3186a2e5544ba0db8
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