Added handling to ensure trailing slashes on static files do not disregard query strings.

Closes #28071

(cherry picked from commit 6d69375)

When adjusting URLs to support explicit external dependencies when using Vite,
the workaround will now account for the presence of a base HREF value within
the specifier. Vite will automatically add the base HREF as a prefix to the
path when specified. This previously resulted in invalid specifiers due to
the partial removal of the Vite specific `@id` path prefix.

(cherry picked from commit 37a2138)

Ensure direct requests to HTML files result in them being served.

Closes #28063

(cherry picked from commit 11a140b)

The Sass rebasing lexer was incorrectly checking for a comma in certain
cases previously. This has now been corrected and url usage that immediately
follows a comma within a rule will now be extracted as expected.

(cherry picked from commit 8ff687d)