removed culture dependency from ConversionsTests

Block any commits that derive from a bad merge we removed via force push

- It should no longer block future -> master merges, since we've done
  that now.
- It should block any new pull requests that contain the previous
  bad merge.

fix issue with telemetry.

Replace property with method

it looks like diagnostic telemetry got broken when we introduced a new flag for diagnostic engines in update 1.

also recent engine v2 changes didn't report all telemetry data

Merge master into future

Make compiler familiar with TH2 format of DeprecatedAttribute.

* Bug 217740: Repro and test harness for C#

* Testing and fixing loading scenario in C# and VB

* Verifying VB case using attribute on field

* Adding more tests

* Adding VB tests

* Adding tests

* More tests on fields with double-attributes

* New test constraint

* Fixing VB side to new test constraints

* Fixing C# side to new test constraints

* Fixing remaining tests

* Adding comments

* Fixing VB field scenario too

Assert that completion has a TypeInferenceService

So far compiler knows about the following signatures of DeprecatedAttribute constructor.
   DeprecatedAttribute(String, DeprecationType, UInt32)
   DeprecatedAttribute(String, DeprecationType, UInt32, Platform)
   DeprecatedAttribute(String, DeprecationType, UInt32, Type)

As of TH2 and onwards  Windows SDK  uses the following signature for the DeprecatedAttribute:

     DeprecatedAttribute(String, DeprecationType, UInt32, String)

Notice the "String" at the end of the signature.
This change adds the TH2 attribute signature to the known set.

Fixes: #10630

Use new UI for `this.`/`Me.` and add a fix-all code action for qualification.

Merge master into future

Make call to compilation.CompleteTrees really unconditional.