Merge June release back to main (#6228)

* release candidate (#6059)

* release candidate

* Memorial Day API changes (#6056)

* update changelog

Co-authored-by: Ian Huff <ianhu@microsoft.com>

* Memorial Day API changes (#6056)

* Send only error type in reason (#6067)

* Fallback for sys.prefix not being returned by Python extension (#6053)

* Fixes to toggling output (#6068)

* Better telemetry when we don't find a matching kernel (#6060)

* Better data when fail to find kernel connection (#6070)

* change version and API port (#6085)

* change version to 2021.6.x

* match packagejson and changelog versions

* 6/2 API Changes (#6089)

Co-authored-by: Ian Huff <ianhu@microsoft.com>

* Port #6025 to release (#6103)

* Remove our Run Above/Below commands (#6026)

* Update changelog

* Fix pervasive test issue with editor properties (#6100) (#6106)

* update version to 2021.6.99 to be able to filter (#6122)

* update version to 2021.6.99 to be able to filter
update changelog

* update package lock and VSCode api

* don

* remove api changes in the code

* Port Don's fixes (#6115)

* Fix test failures resulting from VSCodes Notebook Start page (#6111)

* Disable kernel auto startup in untrusted workspace (#6088)

* Disable kernel auto startup in untrusted workspace

* Fixes

* Misc

* oops

* misc

* Fixes to breaking tests (#6074)

Co-authored-by: Don Jayamanne <don.jayamanne@outlook.com>

* Breaking changes ports to release (2 commits) (#6140)

* add component governance file (#6166)

* add component governance file

* remove npm components

* Cherry pick changes from main branch into release (#6174)

* final update (#6176)

* final update

* update changelog

* add missing thanks to changelog (#6197)

* Skip uploading vsix to azure blob store (#6204)

* publish release

* publish release

* remove last 2 numbers from release (#6219)

* publish release

* fix conflicts

* update engine to 1.58.0-insider

* return engine version to 1.57.0-insider

* Do not activate Python before opening nb (#6201) (#6230)

* publish release

Co-authored-by: Ian Huff <ianhu@microsoft.com>
Co-authored-by: Don Jayamanne <don.jayamanne@yahoo.com>
Co-authored-by: Don Jayamanne <don.jayamanne@outlook.com>
Co-authored-by: Joyce Er <joyceerhuiling@gmail.com>

CHANGELOG.md

@@ -17,6 +17,7 @@
 1. Add support for [Virtual Workspaces](https://github.com/microsoft/vscode/wiki/Virtual-Workspaces).
    ([#5803](https://github.com/Microsoft/vscode-jupyter/issues/5803))
 1. Losslessly compressed PNG images to save ~20KB.
+   (thanks [Christopher Yeh](https://github.com/chrisyeh96))
    ([#5869](https://github.com/Microsoft/vscode-jupyter/issues/5869))
 1. Adopt `notebook/toolbar` contribution point for native notebooks.
    ([#5954](https://github.com/Microsoft/vscode-jupyter/issues/5954))