HCK-14467: Error when applying DDL statements containing comments (#82)

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<a href="https://hackolade.atlassian.net/browse/HCK-14467"
title="HCK-14467" target="_blank"><img alt="Sub-bug"
src="https://hackolade.atlassian.net/rest/api/2/universal_avatar/view/type/issuetype/avatar/10303?size=medium"
/>HCK-14467</a> [DB2][Apply to instance]: error is thrown on apply ddl
with comments
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## Technical details

Added a method to remove multiline `/**/ `and inline `--` comments when
executing the query.
The root cause: Statements with comments only were being executed as
SQL, which Db2 saw as having no tokens

Author: Nightlngale

shared/Db2Client/src/main/java/org/db2/Db2Service.java

@@ -32,7 +32,8 @@ public JSONArray executeQuery(String query) throws SQLException {
 	}
 
 	public int applyScript(String script) throws SQLException {
-		String[] statements = splitStatements(script);
+		String cleanedScript = removeComments(script);
+		String[] statements = splitStatements(cleanedScript);
 		int totalUpdateCount = 0;
 
 		for (String statement : statements) {
@@ -72,6 +73,10 @@ public int applyScript(String script) throws SQLException {
 		return totalUpdateCount;
 	}
 
+	private String removeComments(String script) {
+		return script.replaceAll("(?s)(?m)(?<=\\n)(?:/\\*.*?\\*/|--.*?$)(?=\\n)", "");
+	}
+
 	private String[] splitStatements(String query) {
 		String[] parts = query.trim().split(";\\s+", -1);
 		java.util.ArrayList<String> statements = new java.util.ArrayList<>();