Extract add h2 dependency logic

Introduces a new function, `addH2Dependency`, to the build.gradle script. This function is responsible for appending the H2 database dependency details to the Ballerina TOML file.

ballerina/build.gradle

@@ -1082,6 +1082,15 @@ task testExamples() {
  }
 }
 
+def addH2Dependency = { filePath ->
+ // Add the H2 database dependency to Ballerina.toml file
+ def tomlFile = new File(filePath)
+ tomlFile.append("\n\n[[platform.java17.dependency]]")
+ tomlFile.append("\nartifactId = \"h2\"")
+ tomlFile.append("\nversion = \"2.2.224\"")
+ tomlFile.append("\ngroupId = \"com.h2database\"")
+}
+
 def buildAndTestStandardLibs = { distPath, stdlibTest, isStageTest, testMinorVersionDifference ->
  def exitVal
  def additionalBuildParams = ""
@@ -1102,11 +1111,7 @@ def buildAndTestStandardLibs = { distPath, stdlibTest, isStageTest, testMinorVer
  commandLine 'cmd', '/c', "${distPath}/bin/bal.bat init test"
  }
  if (stdlibTest == 'transaction') {
- def tomlFile = new File("${distPath}/${stdlibTest}/Ballerina.toml")
- tomlFile.append("\n\n[[platform.java17.dependency]]")
- tomlFile.append("\nartifactId = \"h2\"")
- tomlFile.append("\nversion = \"2.2.224\"")
- tomlFile.append("\ngroupId = \"com.h2database\"")
+ addH2Dependency("${distPath}/${stdlibTest}/Ballerina.toml")
  }
  } else {
  exec {
@@ -1132,11 +1137,7 @@ def buildAndTestStandardLibs = { distPath, stdlibTest, isStageTest, testMinorVer
  commandLine 'sh', '-c', "${distPath}/bin/bal init test"
  }
  if (stdlibTest == 'transaction') {
- def tomlFile = new File("${distPath}/${stdlibTest}/Ballerina.toml")
- tomlFile.append("\n\n[[platform.java17.dependency]]")
- tomlFile.append("\nartifactId = \"h2\"")
- tomlFile.append("\nversion = \"2.2.224\"")
- tomlFile.append("\ngroupId = \"com.h2database\"")
+ addH2Dependency("${distPath}/${stdlibTest}/Ballerina.toml")
  }
  } else {
  exec {