Make Ctrl+Enter submit a pending comment (starting review) instead of submitting a single comment (#23245)

Close #23241

Before: press Ctrl+Enter in the Code Review Form, a single comment will
be added.

After: press Ctrl+Enter in the Code Review Form, start the review with
pending comments.


The old name `is_review` is not clear, so the new code use
`pending_review` as the new name.

Co-authored-by: delvh <leon@kske.dev>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

routers/api/v1/repo/pull_review.go

@@ -268,7 +268,7 @@ func DeletePullReview(ctx *context.APIContext) {
 	ctx.Status(http.StatusNoContent)
 }
 
-// CreatePullReview create a review to an pull request
+// CreatePullReview create a review to a pull request
 func CreatePullReview(ctx *context.APIContext) {
 	// swagger:operation POST /repos/{owner}/{repo}/pulls/{index}/reviews repository repoCreatePullReview
 	// ---
@@ -360,7 +360,7 @@ func CreatePullReview(ctx *context.APIContext) {
 			line,
 			c.Body,
 			c.Path,
-			true, // is review
+			true, // pending review
 			0,    // no reply
 			opts.CommitID,
 		); err != nil {