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>

pkg/fission-cli/flag/key/key.go

@@ -66,6 +66,7 @@ const (
 	FnConcurrency           = "concurrency"
 	FnRequestsPerPod        = "requestsperpod"
 	FnOnceOnly              = "onceonly"
+	FnSubPath               = "subpath"
 
 	HtName              = resourceName
 	HtMethod            = "method"
@@ -78,6 +79,7 @@ const (
 	HtFnName            = "function"
 	HtFnWeight          = "weight"
 	HtFilter            = HtFnName
+	HtPrefix            = "prefix"
 
 	TtName   = resourceName
 	TtCron   = "cron"