Turn IResultCapture::lastAssertionPassed into a free function

The thread-safety changes in assertions & messages turned whether
the last assertion passed or failed into thread-local state,
instead of being member of the `RunContext`. However, this change
was not reflected in the API `CHECKED_IF`/`CHECKED_ELSE` used,
which in turn required `catch_test_macro_impl.hpp` to include
`catch_interfaces_capture.hpp` for it.

Thanks to the combination of this commit and the previous similar
commit for the message stack handling, the main include path does
not need to include `catch_interfaces_capture.hpp` anymore.

src/catch2/interfaces/catch_interfaces_capture.hpp

@@ -61,7 +61,6 @@ namespace Catch {
         virtual void benchmarkEnded( BenchmarkStats<> const& stats ) = 0;
         virtual void benchmarkFailed( StringRef error ) = 0;
 
-
         virtual void handleFatalErrorCondition( StringRef message ) = 0;
 
         virtual void handleExpr
@@ -87,9 +86,6 @@ namespace Catch {
                     ResultWas::OfType resultType,
                     AssertionReaction &reaction ) = 0;
 
-
-        virtual bool lastAssertionPassed() = 0;
-
         // Deprecated, do not use:
         virtual std::string getCurrentTestName() const = 0;
         virtual const AssertionResult* getLastResult() const = 0;

src/catch2/internal/catch_run_context.cpp

@@ -324,6 +324,9 @@ namespace Catch {
         void addUnscopedMessage( MessageInfo&& message ) {
             Detail::g_messageHolder().addUnscopedMessage( CATCH_MOVE( message ) );
         }
+
+        bool lastAssertionPassed() { return Detail::g_lastAssertionPassed; }
+
     } // namespace Detail
 
     RunContext::RunContext(IConfig const* _config, IEventListenerPtr&& reporter)
@@ -720,10 +723,6 @@ namespace Catch {
         m_reporter->testRunEnded(TestRunStats(m_runInfo, m_totals, false));
     }
 
-    bool RunContext::lastAssertionPassed() {
-        return Detail::g_lastAssertionPassed;
-    }
-
     void RunContext::assertionPassedFastPath(SourceLineInfo lineInfo) {
         // We want to save the line info for better experience with unexpected assertions
         Detail::g_lastKnownLineInfo = lineInfo;
@@ -953,7 +952,6 @@ namespace Catch {
         }
     }
 
-
     void seedRng(IConfig const& config) {
         sharedRng().seed(config.rngSeed());
     }

src/catch2/internal/catch_run_context.hpp

@@ -102,8 +102,6 @@ namespace Catch {
 
         void handleFatalErrorCondition( StringRef message ) override;
 
-        bool lastAssertionPassed() override;
-
     public:
         // !TBD We need to do this another way!
         bool aborting() const;

src/catch2/internal/catch_test_macro_impl.hpp

@@ -11,10 +11,16 @@
 #include <catch2/catch_user_config.hpp>
 #include <catch2/internal/catch_assertion_handler.hpp>
 #include <catch2/internal/catch_preprocessor_internal_stringify.hpp>
-#include <catch2/interfaces/catch_interfaces_capture.hpp>
 #include <catch2/internal/catch_stringref.hpp>
 #include <catch2/internal/catch_source_line_info.hpp>
 
+namespace Catch {
+    namespace Detail {
+        // Defined in catch_run_context.cpp, where the thread-local data lives.
+        bool lastAssertionPassed();
+    }
+}
+
 // We need this suppression to leak, because it took until GCC 10
 // for the front end to handle local suppression via _Pragma properly
 #if defined(__GNUC__) && !defined(__clang__) && !defined(__ICC) && __GNUC__ <= 9
@@ -57,12 +63,12 @@
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_IF( macroName, resultDisposition, ... ) \
     INTERNAL_CATCH_TEST( macroName, resultDisposition, __VA_ARGS__ ); \
-    if( Catch::getResultCapture().lastAssertionPassed() )
+    if( Catch::Detail::lastAssertionPassed() )
 
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_ELSE( macroName, resultDisposition, ... ) \
     INTERNAL_CATCH_TEST( macroName, resultDisposition, __VA_ARGS__ ); \
-    if( !Catch::getResultCapture().lastAssertionPassed() )
+    if( !Catch::Detail::lastAssertionPassed() )
 
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_NO_THROW( macroName, resultDisposition, ... ) \