fix: try to serve assets from unencoded and encoded paths (#6728)

Co-authored-by: Greg Brimble <grimble@cloudflare.com>

.changeset/shaggy-peas-notice.md

@@ -0,0 +1,11 @@
+---
+"@cloudflare/workers-shared": patch
+"miniflare": patch
+"wrangler": patch
+---
+
+fix: remove filepath encoding on asset upload and handle sometimes-encoded characters
+
+Some characters like [ ] @ are encoded by encodeURIComponent() but are often requested at an unencoded URL path.
+This change will make assets with filenames with these characters accessible at both the encoded and unencoded paths,
+but to use the encoded path as the canonical one, and to redirect requests to the canonical path if necessary.