Apply TestTypeExcludeFilter in regular applications

Add `ExcludeFilterApplicationContextInitializer` to register the
`TestTypeExcludeFilter` for regular applications.

Prior to this commit, the filter was only registered using the
`ExcludeFilterContextCustomizerFactory` which meant that test components
were filtered in tests but not when using `SpringApplication.from` with
a test classpath.

Fixes gh-35206

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/filter/ExcludeFilterApplicationContextInitializerTests.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2012-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.test.context.filter;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.context.TypeExcludeFilter;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.ComponentScan.Filter;
+import org.springframework.context.annotation.FilterType;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests {@link ExcludeFilterApplicationContextInitializer}.
+ *
+ * @author Phillip Webb
+ */
+class ExcludeFilterApplicationContextInitializerTests {
+
+	@Test
+	void testConfigurationIsExcluded() {
+		SpringApplication application = new SpringApplication(TestApplication.class);
+		application.setWebApplicationType(WebApplicationType.NONE);
+		AssertableApplicationContext applicationContext = AssertableApplicationContext.get(() -> application.run());
+		assertThat(applicationContext).hasSingleBean(TestApplication.class);
+		assertThat(applicationContext).doesNotHaveBean(ExcludedTestConfiguration.class);
+	}
+
+	@ComponentScan(excludeFilters = { @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class) })
+	static class TestApplication {
+
+	}
+
+	@TestConfiguration(proxyBeanMethods = false)
+	static class ExcludedTestConfiguration {
+
+	}
+
+}