chore(deps): update dependencies and clean up legacy code

- Update Go module dependencies for image generation support
- Remove legacy image generation schema implementation

Signed-off-by: Hrushikesh Patil <[email protected]>

Author: nutanix-Hrushikesh

go.mod

@@ -84,6 +84,7 @@ require (
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.5.0 // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/NYTimes/gziphandler v1.1.1 // indirect
+	github.com/andybalholm/brotli v1.2.0 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
 	github.com/avast/retry-go v3.0.0+incompatible // indirect