Enable some more clang-tidy linter checks (#4738)

* Avoid inefficient AString -> c_str() -> AString round trip

* Avoid redundant string init expressions

* Avoid unnecessary return, continue, etc.

* Add .clang-format to help with clang-tidy fix-its

* Avoid unnecessary passing by value

* Avoid unnecessary local copying

* Avoid copying in range-for loops

* Avoid over-complicated boolean expressions

* Some violations missed by my local clang-tidy

* Allow unnecessary continue statements

* Add brackets

* Another expression missed locally

* Move BindingsProcessor call into clang-tidy.sh and add space

* Fix pushd not found error

* Different grouping of CheckBlockInteractionRate

src/OverridesSettingsRepository.cpp

@@ -112,7 +112,7 @@ std::vector<std::pair<AString, AString>> cOverridesSettingsRepository::GetValues
 
 	auto ret = overrides;
 
-	for (auto mainpair : main)
+	for (const auto & mainpair : main)
 	{
 		bool found = false;
 		for (const auto & overridepair : overrides)
@@ -123,7 +123,7 @@ std::vector<std::pair<AString, AString>> cOverridesSettingsRepository::GetValues
 				break;
 			}
 		}
-		if (found == false)
+		if (!found)
 		{
 			ret.push_back(mainpair);
 		}