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/Entities/Entity.cpp

@@ -617,7 +617,6 @@ int cEntity::GetRawDamageAgainst(const cEntity & a_Receiver)
 void cEntity::ApplyArmorDamage(int DamageBlocked)
 {
 	// cEntities don't necessarily have armor to damage.
-	return;
 }
 
 
@@ -2041,11 +2040,10 @@ bool cEntity::IsA(const char * a_ClassName) const
 
 bool cEntity::IsAttachedTo(const cEntity * a_Entity) const
 {
-	if ((m_AttachedTo != nullptr) && (a_Entity->GetUniqueID() == m_AttachedTo->GetUniqueID()))
-	{
-		return true;
-	}
-	return false;
+	return (
+		(m_AttachedTo != nullptr) &&
+		(a_Entity->GetUniqueID() == m_AttachedTo->GetUniqueID())
+	);
 }