remove flux as core extension (#8734)

* add troubleshoot command under connectedk8s

* resolve check issues

* fix final new line

* add back troubleshoot params

* implement helm version and permission checks

* remove flux as core extension

* remove connectedk8s changes

* update history.rst

* upgrade to major version

* upgrade to major version

---------

Co-authored-by: Sophie Zhao <sophiezhao@microsoft.com>

Author: sophsoph321

src/aks-preview/HISTORY.rst

@@ -11,6 +11,10 @@ To release a new version, please select a new version number (usually plus 1 to
 
 Pending
 +++++++
+16.0.0b1
++++++++
+* [BREAKING CHANGE] Remove flux extension from the list of supported core extensions
+
 15.0.0b2
 +++++++
 * Add aks extension and aks extension-type command groups

src/aks-preview/azext_aks_preview/_helpers.py

@@ -41,7 +41,7 @@
 
 # type variables
 ManagedCluster = TypeVar("ManagedCluster")
-allowed_extensions = ["microsoft.dataprotection.kubernetes", "microsoft.flux"]
+allowed_extensions = ["microsoft.dataprotection.kubernetes"]
 
 
 def which(binary):