fix(codebuild): Project.addFileSystemLocation does not work without providing locations at construction (#10460)

Fixes #10442

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: skinny85

packages/@aws-cdk/aws-codebuild/lib/project.ts

@@ -751,7 +751,7 @@ export class Project extends ProjectBase {
       artifacts: artifactsConfig.artifactsProperty,
       serviceRole: this.role.roleArn,
       environment: this.renderEnvironment(props.environment, environmentVariables),
-      fileSystemLocations: this.renderFileSystemLocations(),
+      fileSystemLocations: Lazy.anyValue({ produce: () => this.renderFileSystemLocations() }),
       // lazy, because we have a setter for it in setEncryptionKey
       encryptionKey: Lazy.stringValue({ produce: () => this._encryptionKey && this._encryptionKey.keyArn }),
       badgeEnabled: props.badge,

packages/@aws-cdk/aws-codebuild/test/test.codebuild.ts

@@ -1036,12 +1036,6 @@ export = {
         buildSpec: codebuild.BuildSpec.fromObject({
           version: '0.2',
         }),
-        fileSystemLocations: [codebuild.FileSystemLocation.efs({
-          identifier: 'myidentifier2',
-          location: 'myclodation.mydnsroot.com:/loc',
-          mountPoint: '/media',
-          mountOptions: 'opts',
-        })],
       });
       project.addFileSystemLocation(codebuild.FileSystemLocation.efs({
         identifier: 'myidentifier3',
@@ -1052,13 +1046,6 @@ export = {
 
       expect(stack).to(haveResourceLike('AWS::CodeBuild::Project', {
         'FileSystemLocations': [
-          {
-            'Identifier': 'myidentifier2',
-            'MountPoint': '/media',
-            'MountOptions': 'opts',
-            'Location': 'myclodation.mydnsroot.com:/loc',
-            'Type': 'EFS',
-          },
           {
             'Identifier': 'myidentifier3',
             'MountPoint': '/media',