chore: delete the previous ran results before create new comment (#23)

avoid having too many run results in PR comments.
e.g. vuejs/core#12935

Author: edison1105

.github/workflows/ecosystem-ci-from-pr.yml

@@ -233,11 +233,38 @@ jobs:
             }).join("\n")}
             `
 
-            await github.rest.issues.deleteComment({
-              owner: context.repo.owner,
-              repo: 'core',
-              comment_id: ${{ needs.init.outputs.comment-id }}
-            })
+            if (selectedSuite === "-") {
+              // delete the previous ran results
+              try {
+                const { data: comments } = await github.rest.issues.listComments({
+                  issue_number: context.payload.inputs.prNumber,
+                  owner: context.repo.owner,
+                  repo: 'core'
+                })
+                const workflowComments = comments.filter(comment =>
+                  comment.body.includes('Ran ecosystem CI:') || comment.body.includes('Triggered ecosystem CI:')
+                )
+                for (const comment of workflowComments) {
+                  await github.rest.issues.deleteComment({
+                    owner: context.repo.owner,
+                    repo: 'core',
+                    comment_id: comment.id
+                  });
+                  console.log(`Deleted previous comment: ${comment.id}`);
+                }
+              } catch (error) {
+                console.log('Error when trying to delete previous comments:', error);
+              }
+            }
+
+            try {
+              await github.rest.issues.deleteComment({
+                owner: context.repo.owner,
+                repo: 'core',
+                comment_id: ${{ needs.init.outputs.comment-id }}
+              })
+            } catch (error) {
+            }
 
             await github.rest.issues.createComment({
               issue_number: context.payload.inputs.prNumber,