fix pmd AvoidThrowingRawExceptionTypes

Author: Benjosh95

core/src/main/java/cloud/stackit/sdk/core/KeyFlowAuthenticator.java

@@ -134,7 +134,7 @@ public Request authenticate(Route route, @NotNull Response response) throws IOEx
 		try {
 			accessToken = getAccessToken();
 		} catch (ApiException | InvalidKeySpecException e) {
-			throw new RuntimeException(e);
+			throw new IllegalStateException(e);
 		}
 
 		// Return a new request with the refreshed token
@@ -220,7 +220,7 @@ protected void createAccessToken()
 		try {
 			assertion = generateSelfSignedJWT();
 		} catch (NoSuchAlgorithmException e) {
-			throw new RuntimeException(
+			throw new IllegalStateException(
 					"could not find required algorithm for jwt signing. This should not happen and should be reported on https://github.com/stackitcloud/stackit-sdk-java/issues",
 					e);
 		}

core/src/main/java/cloud/stackit/sdk/core/KeyFlowInterceptor.java

@@ -37,7 +37,7 @@ public Response intercept(Chain chain) throws IOException {
 		} catch (InvalidKeySpecException | ApiException e) {
 			// try-catch required, because ApiException can not be thrown in the implementation
 			// of Interceptor.intercept(Chain chain)
-			throw new RuntimeException(e);
+			throw new IllegalStateException(e);
 		}
 
 		Request authenticatedRequest =

core/src/main/java/cloud/stackit/sdk/core/auth/SetupAuth.java

@@ -80,7 +80,7 @@ public void init() throws IOException {
 	@Deprecated
 	public Interceptor getAuthHandler() {
 		if (authHandler == null) {
-			throw new RuntimeException("init() has to be called first");
+			throw new IllegalStateException("init() has to be called first");
 		}
 		return authHandler;
 	}