Enable prefix based routing (#2047)

* Enable prefix based routing

Signed-off-by: Harsh Thakur <harshthakur9030@gmail.com>

* Optimize checking condition

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Disable few tests

* disable router modification for now

* run code generator

* Collect fission dump in CI

* Enable all tests back

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Remove unwanted code

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Add prefix support at more places and couple of todo's

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Few more changes

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Improve function trim support

* Support for prefix based urls in fission function test

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* multi route for fission function test

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Improve validations in trigger creations

* Adjust leading / in url from fission

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Change suburl to subpath for function test

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

Co-authored-by: Sanket Sudake <sanketsudake@gmail.com>

crds/v1/fission.io_httptriggers.yaml

@@ -79,12 +79,14 @@ spec:
               method:
                 description: HTTP method to access a function.
                 type: string
+              prefix:
+                description: 'Prefix with which functions are exposed. NOTE: Prefix takes precedence over URL/RelativeURL. Note that it does not treat slashes specially ("/foobar/" will be matched by the prefix "/foobar").'
+                type: string
               relativeurl:
                 description: RelativeURL is the exposed URL for external client to access a function with.
                 type: string
             required:
             - functionref
-            - relativeurl
             type: object
         required:
         - metadata