Always load com.google.devtools.ksp.symbol from the same classloader.

This is similar to CL/538883944. The KSP symbols are exposed through our `dagger.spi.model` classes, so they need to also be included in this list too.

PiperOrigin-RevId: 553491268
Change-Id: I88540674348d80c30313378c2cd5a752da548ca0

src/java_tools/buildjar/java/com/google/devtools/build/buildjar/javac/BlazeJavacMain.java

@@ -402,6 +402,7 @@ protected Class<?> findClass(String name) throws ClassNotFoundException {
                   || name.startsWith("com.google.common.base.")
                   || name.startsWith("com.google.common.graph.")
                   || name.startsWith("com.google.common.regex.")
+                  || name.startsWith("com.google.devtools.ksp.symbol.")
                   || name.startsWith("org.checkerframework.shaded.dataflow.")
                   || name.startsWith("org.checkerframework.errorprone.dataflow.")
                   || name.startsWith("com.sun.source.")