Split parse and render for Goldmark

This also speeds up situations where you only need the fragments/toc and not the rendered content, e.g. Related
with fragments type indexing:

```bash

name            old time/op    new time/op    delta
RelatedSite-10    12.3ms ± 2%    10.7ms ± 1%  -12.95%  (p=0.029 n=4+4)

name            old alloc/op   new alloc/op   delta
RelatedSite-10    38.6MB ± 0%    38.2MB ± 0%   -1.08%  (p=0.029 n=4+4)

name            old allocs/op  new allocs/op  delta
RelatedSite-10      117k ± 0%      115k ± 0%   -1.36%  (p=0.029 n=4+4)
```

Fixes #10750

1 files changed, 4 insertions, 4 deletions

diff --git a/markup/asciidocext/convert.go b/markup/asciidocext/convert.go
index c9524778f..c3bd90edd 100644
--- a/markup/asciidocext/convert.go
+++ b/markup/asciidocext/convert.go
@@ -52,7 +52,7 @@ func (p provider) New(cfg converter.ProviderConfig) (converter.Provider, error)
 }
 
 type asciidocResult struct {
-	converter.Result
+	converter.ResultRender
 	toc *tableofcontents.Fragments
 }
 
@@ -65,7 +65,7 @@ type asciidocConverter struct {
 	cfg converter.ProviderConfig
 }
 
-func (a *asciidocConverter) Convert(ctx converter.RenderContext) (converter.Result, error) {
+func (a *asciidocConverter) Convert(ctx converter.RenderContext) (converter.ResultRender, error) {
 	b, err := a.getAsciidocContent(ctx.Src, a.ctx)
 	if err != nil {
 		return nil, err
@@ -75,8 +75,8 @@ func (a *asciidocConverter) Convert(ctx converter.RenderContext) (converter.Resu
 		return nil, err
 	}
 	return asciidocResult{
-		Result: converter.Bytes(content),
-		toc:    toc,
+		ResultRender: converter.Bytes(content),
+		toc:          toc,
 	}, nil
 }