Manage all Netty dependencies

Until we can use the Netty BOM (see gh-9021), this change adds all
Netty modules as managed dependencies so as to avoid version
clashes between managed and unmanaged Netty dependencies.

Fixes gh-8553

spring-boot-dependencies/pom.xml

@@ -845,16 +845,61 @@
 				<artifactId>netty-codec</artifactId>
 				<version>${netty.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-dns</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-haproxy</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>io.netty</groupId>
 				<artifactId>netty-codec-http</artifactId>
 				<version>${netty.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-http2</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-memcache</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-mqtt</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-redis</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-smtp</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>io.netty</groupId>
 				<artifactId>netty-codec-socks</artifactId>
 				<version>${netty.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-stomp</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-codec-xml</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>io.netty</groupId>
 				<artifactId>netty-common</artifactId>
@@ -875,6 +920,11 @@
 				<artifactId>netty-resolver</artifactId>
 				<version>${netty.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-resolver-dns</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>io.netty</groupId>
 				<artifactId>netty-transport</artifactId>
@@ -882,7 +932,17 @@
 			</dependency>
 			<dependency>
 				<groupId>io.netty</groupId>
-				<artifactId>netty-transport-native-epoll</artifactId>
+				<artifactId>netty-transport-rxtx</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-transport-sctp</artifactId>
+				<version>${netty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>io.netty</groupId>
+				<artifactId>netty-transport-udt</artifactId>
 				<version>${netty.version}</version>
 			</dependency>
 			<dependency>