Add Provenance field in TaskRun&PipelineRun status

Change 1: Add a Provenance field in TaskRun&PipelineRun status. This field
currently only contains a subfield named `ConfigSource`, but can be extended later to
have more provenance-related fields.

Change 2: Prior, tektoncd#5551 introduced
the ConfigSource to api/resolution alpha & beta package. In this PR, we moved
the ConfigSource to api/pipeline alpha & beta package for the provenance field
to reuse that type (cannot import the api/resolution alpha because of
import cycle).

Why: See the motivation and discussions in tektoncd#5550.
The tldr is that it helps pass provenance-related data in a more structured way
ConfigSource is one example.

Signed-off-by: Chuang Wang <chuangw@google.com>

docs/how-to-write-a-resolver.md

@@ -186,11 +186,11 @@ We'll also need to add another import for this package at the top:
 import (
   "context"
 
-  "github.com/tektoncd/pipeline/pkg/apis/resolution/v1beta1"
-// Add this one; it defines LabelKeyResolverType we use in GetSelector
+  // Add this one; it defines LabelKeyResolverType we use in GetSelector
   "github.com/tektoncd/pipeline/pkg/resolution/common"
   "github.com/tektoncd/pipeline/pkg/resolution/resolver/framework"
   "knative.dev/pkg/injection/sharedmain"
+  pipelinev1beta1 "github.com/tektoncd/pipeline/pkg/apis/pipeline/v1beta1"
 )
 ```
 
@@ -262,7 +262,7 @@ func (*myResolvedResource) Annotations() map[string]string {
 
 // Source is the source reference of the remote data that records where the remote 
 // file came from including the url, digest and the entrypoint. None atm.
-func (*myResolvedResource) Source() *v1beta1.ConfigSource {
+func (*myResolvedResource) Source() *pipelinev1beta1.ConfigSource {
 	return nil
 }
 ```
@@ -275,8 +275,8 @@ following example.
 ```go
 // Source is the source reference of the remote data that records where the remote 
 // file came from including the url, digest and the entrypoint.
-func (*myResolvedResource) Source() *v1beta1.ConfigSource {
-	return &v1beta1.ConfigSource{
+func (*myResolvedResource) Source() *pipelinev1beta1.ConfigSource {
+	return &v1alpha1.ConfigSource{
 		URI: "https://github.com/user/example",
 		Digest: map[string]string{
 			"sha1": "example",