Migrate off CircleCI to Jenkins (#5230)

* Add Jenkinsfile

* cd src

* Escape wildcards

* Refactor stages

* Remove CircleCI junk

* Make clang-tidy do something

* updated regex to include only the files in the base src directory

* fixed errors displayed by new clang tidy version

* adjust clang core count to actual count

* Update README with new Jenkins build

Co-authored-by: 12xx12 <44411062+12xx12@users.noreply.github.com>

src/Mobs/Ocelot.cpp

@@ -26,7 +26,7 @@ cOcelot::cOcelot(void) :
 	m_IsTame(false),
 	m_IsBegging(false),
 	m_CatType(ctWildOcelot),
-	m_OwnerName("")
+	m_OwnerName()
 {
 }