Update GitHub workflows to include stream-nb-* branches (#2669)

Author: SammyVimes

.github/workflows/postcommit_asan.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - 'main'
       - 'stable-*'
+      - 'stream-nb-*'
     paths-ignore:
       - 'ydb/docs/**'
       - '.github/**'

.github/workflows/postcommit_relwithdebinfo.yml

@@ -4,6 +4,7 @@ on:
     branches:
       - 'main'
       - 'stable-*'
+      - 'stream-nb-*'
     paths-ignore:
       - 'ydb/docs/**'
       - '.github/**'

.github/workflows/pr_check.yml

@@ -4,6 +4,7 @@ on:
     branches:
       - 'main'
       - 'stable-*'
+      - 'stream-nb-*'
     paths-ignore:
       - 'ydb/docs/**'
       - '*'