fix(schema-compiler): Free jinja instance after compilation (#10169)

Jinja instance stores all templates, because it resolves dependencies inside minijinja. If we have at least one jinja file, then compiler load all templates to jinja instance. Let's free it after compilation to reduce memory usage.

Author: ovr

packages/cubejs-schema-compiler/src/compiler/DataSchemaCompiler.ts

@@ -532,11 +532,14 @@ export class DataSchemaCompiler {
         if (!this.omitErrors) {
           this.throwIfAnyErrors();
         }
+
         // Free unneeded resources
         this.compileV8ContextCache = null;
         this.cubeDictionary.free();
         this.cubeOnlySymbols.free();
         this.cubeAndViewSymbols.free();
+        this.yamlCompiler.free();
+
         return res;
       });
     }

packages/cubejs-schema-compiler/src/compiler/YamlCompiler.ts

@@ -38,6 +38,10 @@ export class YamlCompiler {
   ) {
   }
 
+  public free() {
+    this.jinjaEngine = null;
+  }
+
   public getJinjaEngine(): JinjaEngine {
     if (this.jinjaEngine) {
       return this.jinjaEngine;